#ACA309
Closest named color: Brown Yellow (#B29705). oklch(70.1% 0.147 105.6), rgb(172, 163, 9).
Aa
Black text reads best on this color (7.99:1).
About this color
#ACA309 is a medium-light, vivid yellow. In OKLCH its lightness is 70%, its chroma 0.147 and its hue 106°. Its hue sits on the warm side of the wheel. The nearest named color is Brown Yellow (#B29705), ΔE 0.032 away. Black text reads best on it, at 7.99:1.
| Hue family | Yellows |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.147) |
| Temperature | warm |
| Nearest name | Brown Yellow (#B29705) |
| Black text | 7.99:1 |
| White text | 2.62:1 |
Values
| HEX | #ACA309 |
| RGB | rgb(172, 163, 9) |
| HSL | hsl(57, 90%, 35%) |
| OKLCH | oklch(70.1% 0.147 105.6) |
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 #ACA309 | 2.62:1 | Fails | Lc -56.2 | Large or bold text, headings |
| Black text on #ACA309 | 7.99:1 | AAA | Lc 53.0 | Large or bold text, headings |
| #ACA309 text on white | 2.62:1 | Fails | Lc 51.0 | Large or bold text, headings |
| #ACA309 text on black | 7.99:1 | AAA | Lc -50.9 | Large or bold text, headings |
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 400.
-
Step 50
50
#F6F6ED
oklch(97.1% 0.012 106.6)
-
Step 100
100
#ECEBD7
oklch(93.5% 0.027 104.6)
-
Step 200
200
#DDDCB5
oklch(88.5% 0.052 106.2)
-
Step 300
300
#C8C57D
oklch(80.9% 0.093 106.2)
-
Step 400
400 (this color)
#ACA309
oklch(70.1% 0.147 105.6)
-
Step 500
500
#958D00
oklch(63% 0.134 105.6)
-
Step 600
600
#7D7700
oklch(55.7% 0.119 106.2)
-
Step 700
700
#696300
oklch(49% 0.104 105.5)
-
Step 800
800
#565100
oklch(42.6% 0.091 105.5)
-
Step 900
900
#484400
oklch(37.8% 0.081 105.9)
-
Step 950
950
#2A2800
oklch(27% 0.058 106.8)
#ACA309 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) | #B29D00 | 0.017 |
| Deuteranopia (no green cones) | #B6A21F | 0.018 |
| Tritanopia (no blue cones) | #BA978A | 0.134 |
| Achromatopsia (no color) | #A0A0A0 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #ACA309
#ACA309
oklch(70.1% 0.147 105.6)
- #978FF6
#978FF6
oklch(70.1% 0.148 285.4)
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 #ACA309, closest first.
No curated palette has a color within ΔE 0.04 of #ACA309.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown Yellow #B29705 ΔE 0.032
- Pea Soup Green #94A617 ΔE 0.034
- Ocher #BF9B0C ΔE 0.035
- Muddy Yellow #BFAC05 ΔE 0.039
- Yellow Brown #B79400 ΔE 0.041
- Dark Gold #B59410 ΔE 0.042
- Ocre #C69C04 ΔE 0.043
- Pea Green #8EAB12 ΔE 0.045
Use #ACA309 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.