#BFB101
Closest named color: Muddy Yellow (#BFAC05). oklch(74.9% 0.158 103.8), rgb(191, 177, 1).
Aa
Black text reads best on this color (9.50:1).
About this color
#BFB101 is a medium-light, vivid yellow. In OKLCH its lightness is 75%, its chroma 0.158 and its hue 104°. Its hue sits on the warm side of the wheel. The nearest named color is Muddy Yellow (#BFAC05), ΔE 0.013 away. Black text reads best on it, at 9.50:1.
| Hue family | Yellows |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.158) |
| Temperature | warm |
| Nearest name | Muddy Yellow (#BFAC05) |
| Black text | 9.50:1 |
| White text | 2.20:1 |
Values
| HEX | #BFB101 |
| RGB | rgb(191, 177, 1) |
| HSL | hsl(56, 99%, 38%) |
| OKLCH | oklch(74.9% 0.158 103.8) |
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 #BFB101 | 2.20:1 | Fails | Lc -48.0 | Large or bold text, headings |
| Black text on #BFB101 | 9.50:1 | AAA | Lc 60.7 | Content text, not long reading |
| #BFB101 text on white | 2.20:1 | Fails | Lc 43.3 | Non-text elements, placeholder text |
| #BFB101 text on black | 9.50:1 | AAA | Lc -58.9 | 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
#F7F6EC
oklch(97.1% 0.013 102)
-
Step 100
100
#EDEBD6
oklch(93.6% 0.028 102.5)
-
Step 200
200
#DFDCB2
oklch(88.6% 0.055 104.1)
-
Step 300
300
#CBC477
oklch(80.9% 0.099 103.9)
-
Step 400
400 (this color)
#BFB101
oklch(74.9% 0.158 103.8)
-
Step 500
500
#988C00
oklch(63.1% 0.133 103.5)
-
Step 600
600
#7F7600
oklch(55.6% 0.118 104.3)
-
Step 700
700
#6B6300
oklch(49.2% 0.104 104)
-
Step 800
800
#585100
oklch(42.8% 0.09 103.8)
-
Step 900
900
#494300
oklch(37.7% 0.08 103.8)
-
Step 950
950
#2B2700
oklch(26.9% 0.057 103.7)
#BFB101 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) | #C2AB00 | 0.016 |
| Deuteranopia (no green cones) | #C7B11E | 0.015 |
| Tritanopia (no blue cones) | #CEA396 | 0.145 |
| Achromatopsia (no color) | #AEAEAE | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BFB101
#BFB101
oklch(74.9% 0.158 103.8)
- #A3A1FF
#A3A1FF
oklch(74.8% 0.134 283.6)
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 #BFB101, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muddy Yellow #BFAC05 ΔE 0.013
- Olive Yellow #C2B709 ΔE 0.017
- Mustard #CEB301 ΔE 0.024
- Mustard Green #A8B504 ΔE 0.034
- Burnt Yellow #D5AB09 ΔE 0.037
- Dark Yellow #D5B60A ΔE 0.037
- Mustard Yellow #D2BD0A ΔE 0.044
- Pea #A4BF20 ΔE 0.048
Use #BFB101 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.