#99C337
Closest named color: Pea (#A4BF20). oklch(76.1% 0.169 125), rgb(153, 195, 55).
Aa
Black text reads best on this color (10.21:1).
About this color
#99C337 is a medium-light, vivid yellow. In OKLCH its lightness is 76%, its chroma 0.169 and its hue 125°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Pea (#A4BF20), ΔE 0.016 away. Black text reads best on it, at 10.21:1.
| Hue family | Yellows |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.169) |
| Temperature | in between |
| Nearest name | Pea (#A4BF20) |
| Black text | 10.21:1 |
| White text | 2.05:1 |
Values
| HEX | #99C337 |
| RGB | rgb(153, 195, 55) |
| HSL | hsl(78, 56%, 49%) |
| OKLCH | oklch(76.1% 0.169 125) |
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 #99C337 | 2.05:1 | Fails | Lc -44.5 | Non-text elements, placeholder text |
| Black text on #99C337 | 10.21:1 | AAA | Lc 64.0 | Content text, not long reading |
| #99C337 text on white | 2.05:1 | Fails | Lc 39.9 | Non-text elements, placeholder text |
| #99C337 text on black | 10.21:1 | AAA | Lc -62.4 | Content text, not long reading |
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 300.
-
Step 50
50
#F2F8E8
oklch(97% 0.022 123.6)
-
Step 100
100
#E2F0CD
oklch(93.6% 0.049 125.1)
-
Step 200
200
#CBE5A0
oklch(88.6% 0.095 125.1)
-
Step 300
300 (this color)
#99C337
oklch(76.1% 0.169 125)
-
Step 400
400
#88B200
oklch(70.7% 0.177 124.8)
-
Step 500
500
#749900
oklch(63.2% 0.159 125)
-
Step 600
600
#618000
oklch(55.5% 0.139 124.8)
-
Step 700
700
#516C00
oklch(49.2% 0.123 125)
-
Step 800
800
#425800
oklch(42.6% 0.107 124.6)
-
Step 900
900
#364A00
oklch(37.8% 0.095 125.3)
-
Step 950
950
#1F2C00
oklch(27.1% 0.068 125.1)
#99C337 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) | #CEB61E | 0.075 |
| Deuteranopia (no green cones) | #C8B443 | 0.077 |
| Tritanopia (no blue cones) | #A0BAA8 | 0.138 |
| Achromatopsia (no color) | #B5B5B5 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99C337
#99C337
oklch(76.1% 0.169 125)
- #C896FF
#C896FF
oklch(76% 0.154 305)
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 #99C337, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pea #A4BF20 ΔE 0.016
- Bright Olive #9CBB04 ΔE 0.024
- Yellow Green #9ACD32 ΔE 0.028
- Slime Green #99CC04 ΔE 0.034
- Mustard Green #A8B504 ΔE 0.038
- Light Olive Green #A4BE5C ΔE 0.042
- Dark Lime Green #7EBD01 ΔE 0.044
- Apple #6ECB3C ΔE 0.047
Use #99C337 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.