#99901C
Closest named color: Dark Mustard (#A88905). oklch(64.2% 0.128 104.7), rgb(153, 144, 28).
Aa
Black text reads best on this color (6.36:1).
About this color
#99901C is a medium-light, moderately saturated yellow. In OKLCH its lightness is 64%, its chroma 0.128 and its hue 105°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Mustard (#A88905), ΔE 0.027 away. Black text reads best on it, at 6.36:1.
| Hue family | Yellows |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.128) |
| Temperature | warm |
| Nearest name | Dark Mustard (#A88905) |
| Black text | 6.36:1 |
| White text | 3.30:1 |
Values
| HEX | #99901C |
| RGB | rgb(153, 144, 28) |
| HSL | hsl(56, 69%, 35%) |
| OKLCH | oklch(64.2% 0.128 104.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #99901C | 3.30:1 | AA large text | Lc -65.7 | Content text, not long reading |
| Black text on #99901C | 6.36:1 | AA | Lc 43.8 | Non-text elements, placeholder text |
| #99901C text on white | 3.30:1 | AA large text | Lc 60.3 | Content text, not long reading |
| #99901C text on black | 6.36:1 | AA | Lc -41.5 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F6F6EF
oklch(97.1% 0.009 106.6)
-
Step 100
100
#EBEBDD
oklch(93.6% 0.019 106.8)
-
Step 200
200
#DCDBC1
oklch(88.5% 0.035 105.3)
-
Step 300
300
#C6C395
oklch(80.8% 0.062 104.6)
-
Step 400
400
#AAA457
oklch(70.7% 0.099 104.7)
-
Step 500
500 (this color)
#99901C
oklch(64.2% 0.128 104.7)
-
Step 600
600
#7E7600
oklch(55.5% 0.118 104.9)
-
Step 700
700
#6A6300
oklch(49.1% 0.104 104.8)
-
Step 800
800
#575100
oklch(42.7% 0.09 104.7)
-
Step 900
900
#484300
oklch(37.6% 0.08 104.8)
-
Step 950
950
#2B2804
oklch(27.2% 0.053 104.7)
#99901C with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #9E8B00 | 0.014 |
| Deuteranopia (no green cones) | #A19026 | 0.015 |
| Tritanopia (no blue cones) | #A5857B | 0.118 |
| Achromatopsia (no color) | #8D8D8D | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99901C
#99901C
oklch(64.2% 0.128 104.7)
- #8580D7
#8580D7
oklch(64.2% 0.128 284.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #99901C, closest first.
No curated palette has a color within ΔE 0.04 of #99901C.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Mustard #A88905 ΔE 0.027
- Pea Soup #929901 ΔE 0.030
- Yellowy Brown #AE8B0C ΔE 0.034
- Brown Yellow #B29705 ΔE 0.045
- Dark Gold #B59410 ΔE 0.046
- Yellow Brown #B79400 ΔE 0.049
- Camo #7F8F4E ΔE 0.051
- Mustard Brown #AC7E04 ΔE 0.053
Use #99901C in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.