#BFCB34
Closest named color: Mustard Yellow (#D2BD0A). oklch(80.7% 0.166 114.1), rgb(191, 203, 52).
Aa
Black text reads best on this color (11.80:1).
About this color
#BFCB34 is a light, vivid yellow. In OKLCH its lightness is 81%, its chroma 0.166 and its hue 114°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mustard Yellow (#D2BD0A), ΔE 0.040 away. Black text reads best on it, at 11.80:1.
| Hue family | Yellows |
| Lightness | light (81%) |
| Chroma | vivid (0.166) |
| Temperature | in between |
| Nearest name | Mustard Yellow (#D2BD0A) |
| Black text | 11.80:1 |
| White text | 1.77:1 |
Values
| HEX | #BFCB34 |
| RGB | rgb(191, 203, 52) |
| HSL | hsl(65, 59%, 50%) |
| OKLCH | oklch(80.7% 0.166 114.1) |
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 #BFCB34 | 1.77:1 | Fails | Lc -36.6 | Non-text elements, placeholder text |
| Black text on #BFCB34 | 11.80:1 | AAA | Lc 71.2 | Content text, not long reading |
| #BFCB34 text on white | 1.77:1 | Fails | Lc 32.6 | Non-text elements, placeholder text |
| #BFCB34 text on black | 11.80:1 | AAA | Lc -70.0 | 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
#F5F7E7
oklch(97% 0.021 112.6)
-
Step 100
100
#E9EECA
oklch(93.6% 0.048 113.7)
-
Step 200
200
#D8E19A
oklch(88.6% 0.092 114.2)
-
Step 300
300 (this color)
#BFCB34
oklch(80.7% 0.166 114.1)
-
Step 400
400
#A0AA00
oklch(70.6% 0.159 113.9)
-
Step 500
500
#899200
oklch(63.1% 0.142 114.1)
-
Step 600
600
#737B00
oklch(55.7% 0.125 114.2)
-
Step 700
700
#606700
oklch(49.1% 0.111 114.3)
-
Step 800
800
#4F5400
oklch(42.7% 0.096 113.7)
-
Step 900
900
#414600
oklch(37.7% 0.085 114.3)
-
Step 950
950
#262900
oklch(26.9% 0.06 113.9)
#BFCB34 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) | #DAC110 | 0.042 |
| Deuteranopia (no green cones) | #DAC441 | 0.045 |
| Tritanopia (no blue cones) | #CCBFAE | 0.145 |
| Achromatopsia (no color) | #C2C2C2 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BFCB34
#BFCB34
oklch(80.7% 0.166 114.1)
- #C4B2FF
#C4B2FF
oklch(80.6% 0.109 294.6)
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 #BFCB34, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Yellow #D2BD0A ΔE 0.040
- Yellow Green #9ACD32 ΔE 0.048
- Olive Yellow #C2B709 ΔE 0.050
- Pea #A4BF20 ΔE 0.052
- Slime Green #99CC04 ΔE 0.055
- Pale Olive Green #B1D27B ΔE 0.056
- Dark Yellow #D5B60A ΔE 0.057
- Greenish Tan #BCCB7A ΔE 0.060
Use #BFCB34 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.