#99B500
Closest named color: Bright Olive (#9CBB04). oklch(72.6% 0.173 120.2), rgb(153, 181, 0).
Aa
Black text reads best on this color (8.96:1).
About this color
#99B500 is a medium-light, vivid yellow. In OKLCH its lightness is 73%, its chroma 0.173 and its hue 120°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Bright Olive (#9CBB04), ΔE 0.017 away. Black text reads best on it, at 8.96:1.
| Hue family | Yellows |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.173) |
| Temperature | in between |
| Nearest name | Bright Olive (#9CBB04) |
| Black text | 8.96:1 |
| White text | 2.34:1 |
Values
| HEX | #99B500 |
| RGB | rgb(153, 181, 0) |
| HSL | hsl(69, 100%, 35%) |
| OKLCH | oklch(72.6% 0.173 120.2) |
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 #99B500 | 2.34:1 | Fails | Lc -50.9 | Large or bold text, headings |
| Black text on #99B500 | 8.96:1 | AAA | Lc 58.0 | Large or bold text, headings |
| #99B500 text on white | 2.34:1 | Fails | Lc 46.0 | Large or bold text, headings |
| #99B500 text on black | 8.96:1 | AAA | Lc -56.1 | 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
#F4F7EC
oklch(97.1% 0.015 119.1)
-
Step 100
100
#E7EDD6
oklch(93.5% 0.031 118.9)
-
Step 200
200
#D3E0B4
oklch(88.6% 0.06 121)
-
Step 300
300
#B7CB7A
oklch(80.8% 0.108 120.2)
-
Step 400
400 (this color)
#99B500
oklch(72.6% 0.173 120.2)
-
Step 500
500
#7E9600
oklch(63.2% 0.151 120.4)
-
Step 600
600
#6A7E00
oklch(55.7% 0.132 120.1)
-
Step 700
700
#586A00
oklch(49.2% 0.117 120.6)
-
Step 800
800
#485600
oklch(42.6% 0.101 120)
-
Step 900
900
#3C4800
oklch(37.7% 0.09 119.9)
-
Step 950
950
#222B00
oklch(27.1% 0.065 121.1)
#99B500 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) | #C1AA00 | 0.062 |
| Deuteranopia (no green cones) | #BEAA22 | 0.062 |
| Tritanopia (no blue cones) | #A3AB9A | 0.147 |
| Achromatopsia (no color) | #A9A9A9 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99B500
#99B500
oklch(72.6% 0.173 120.2)
- #B88BFF
#B88BFF
oklch(72.7% 0.168 300.2)
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 #99B500, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Olive #9CBB04 ΔE 0.017
- Mustard Green #A8B504 ΔE 0.021
- Avocado #90B134 ΔE 0.025
- Dark Lime #84B701 ΔE 0.026
- Icky Green #8FAE22 ΔE 0.027
- Pea #A4BF20 ΔE 0.032
- Pea Green #8EAB12 ΔE 0.033
- Dark Lime Green #7EBD01 ΔE 0.037
Use #99B500 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.