#B4CF21
Closest named color: Yellow Green (#9ACD32). oklch(80.7% 0.182 119), rgb(180, 207, 33).
Aa
Black text reads best on this color (11.88:1).
About this color
#B4CF21 is a light, vivid yellow. In OKLCH its lightness is 81%, its chroma 0.182 and its hue 119°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Yellow Green (#9ACD32), ΔE 0.033 away. Black text reads best on it, at 11.88:1.
| Hue family | Yellows |
| Lightness | light (81%) |
| Chroma | vivid (0.182) |
| Temperature | in between |
| Nearest name | Yellow Green (#9ACD32) |
| Black text | 11.88:1 |
| White text | 1.76:1 |
Values
| HEX | #B4CF21 |
| RGB | rgb(180, 207, 33) |
| HSL | hsl(69, 73%, 47%) |
| OKLCH | oklch(80.7% 0.182 119) |
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 #B4CF21 | 1.76:1 | Fails | Lc -36.2 | Non-text elements, placeholder text |
| Black text on #B4CF21 | 11.88:1 | AAA | Lc 71.6 | Content text, not long reading |
| #B4CF21 text on white | 1.76:1 | Fails | Lc 32.2 | Non-text elements, placeholder text |
| #B4CF21 text on black | 11.88:1 | AAA | Lc -70.5 | 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
#F3F8E6
oklch(97.1% 0.024 119.5)
-
Step 100
100
#E6EFC8
oklch(93.5% 0.052 118)
-
Step 200
200
#D2E396
oklch(88.5% 0.101 118.6)
-
Step 300
300 (this color)
#B4CF21
oklch(80.7% 0.182 119)
-
Step 400
400
#96AE00
oklch(70.7% 0.166 119.1)
-
Step 500
500
#809500
oklch(63.1% 0.149 119.2)
-
Step 600
600
#6C7D00
oklch(55.6% 0.13 118.8)
-
Step 700
700
#5A6900
oklch(49.1% 0.115 119)
-
Step 800
800
#495600
oklch(42.7% 0.101 119.3)
-
Step 900
900
#3D4800
oklch(37.8% 0.089 119.1)
-
Step 950
950
#232A00
oklch(26.9% 0.063 118.9)
#B4CF21 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) | #DDC300 | 0.061 |
| Deuteranopia (no green cones) | #DAC335 | 0.063 |
| Tritanopia (no blue cones) | #BFC3B1 | 0.157 |
| Achromatopsia (no color) | #C3C3C3 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B4CF21
#B4CF21
oklch(80.7% 0.182 119)
- #CAAFFF
#CAAFFF
oklch(80.6% 0.114 299.3)
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 #B4CF21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Yellow Green #9ACD32 ΔE 0.033
- Slime Green #99CC04 ΔE 0.038
- Pea #A4BF20 ΔE 0.050
- Mustard Yellow #D2BD0A ΔE 0.058
- Olive Yellow #C2B709 ΔE 0.063
- Kiwi Green #8EE53F ΔE 0.065
- Bright Olive #9CBB04 ΔE 0.065
- Pale Olive Green #B1D27B ΔE 0.067
Use #B4CF21 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.