#BFB638
Closest named color: Olive Yellow (#C2B709). oklch(76.1% 0.142 105.2), rgb(191, 182, 56).
Aa
Black text reads best on this color (9.96:1).
About this color
#BFB638 is a medium-light, vivid yellow. In OKLCH its lightness is 76%, its chroma 0.142 and its hue 105°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Yellow (#C2B709), ΔE 0.019 away. Black text reads best on it, at 9.96:1.
| Hue family | Yellows |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.142) |
| Temperature | warm |
| Nearest name | Olive Yellow (#C2B709) |
| Black text | 9.96:1 |
| White text | 2.10:1 |
Values
| HEX | #BFB638 |
| RGB | rgb(191, 182, 56) |
| HSL | hsl(56, 55%, 48%) |
| OKLCH | oklch(76.1% 0.142 105.2) |
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 #BFB638 | 2.10:1 | Fails | Lc -45.8 | Large or bold text, headings |
| Black text on #BFB638 | 9.96:1 | AAA | Lc 62.8 | Content text, not long reading |
| #BFB638 text on white | 2.10:1 | Fails | Lc 41.2 | Non-text elements, placeholder text |
| #BFB638 text on black | 9.96:1 | AAA | Lc -61.1 | 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
#F7F6E8
oklch(97% 0.018 103.4)
-
Step 100
100
#EDECCD
oklch(93.6% 0.041 105.6)
-
Step 200
200
#E0DDA0
oklch(88.5% 0.079 105.5)
-
Step 300
300 (this color)
#BFB638
oklch(76.1% 0.142 105.2)
-
Step 400
400
#AFA500
oklch(70.8% 0.15 105.3)
-
Step 500
500
#968D00
oklch(63.1% 0.134 105.1)
-
Step 600
600
#7E7600
oklch(55.5% 0.118 104.9)
-
Step 700
700
#6A6300
oklch(49.1% 0.104 104.8)
-
Step 800
800
#575100
oklch(42.7% 0.09 104.7)
-
Step 900
900
#484300
oklch(37.6% 0.08 104.8)
-
Step 950
950
#2B2800
oklch(27.1% 0.058 105.3)
#BFB638 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) | #C6AF23 | 0.019 |
| Deuteranopia (no green cones) | #C9B541 | 0.018 |
| Tritanopia (no blue cones) | #CDAA9D | 0.129 |
| Achromatopsia (no color) | #B3B3B3 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BFB638
#BFB638
oklch(76.1% 0.142 105.2)
- #AAA5FF
#AAA5FF
oklch(76.1% 0.128 285.5)
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 #BFB638, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Yellow #C2B709 ΔE 0.019
- Mustard #CEB301 ΔE 0.025
- Muddy Yellow #BFAC05 ΔE 0.028
- Dark Yellow #D5B60A ΔE 0.034
- Mustard Yellow #D2BD0A ΔE 0.039
- Burnt Yellow #D5AB09 ΔE 0.039
- Light Olive Green #A4BE5C ΔE 0.041
- Mustard Green #A8B504 ΔE 0.042
Use #BFB638 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.