#BBB31F
Closest named color: Olive Yellow (#C2B709). oklch(75% 0.153 106.2), rgb(187, 179, 31).
Aa
Black text reads best on this color (9.58:1).
About this color
#BBB31F is a medium-light, vivid yellow. In OKLCH its lightness is 75%, its chroma 0.153 and its hue 106°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Yellow (#C2B709), ΔE 0.017 away. Black text reads best on it, at 9.58:1.
| Hue family | Yellows |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.153) |
| Temperature | warm |
| Nearest name | Olive Yellow (#C2B709) |
| Black text | 9.58:1 |
| White text | 2.19:1 |
Values
| HEX | #BBB31F |
| RGB | rgb(187, 179, 31) |
| HSL | hsl(57, 72%, 43%) |
| OKLCH | oklch(75% 0.153 106.2) |
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 #BBB31F | 2.19:1 | Fails | Lc -47.7 | Large or bold text, headings |
| Black text on #BBB31F | 9.58:1 | AAA | Lc 61.0 | Content text, not long reading |
| #BBB31F text on white | 2.19:1 | Fails | Lc 43.0 | Non-text elements, placeholder text |
| #BBB31F text on black | 9.58:1 | AAA | Lc -59.2 | 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
#F6F6EC
oklch(97% 0.013 106.6)
-
Step 100
100
#ECEBD7
oklch(93.5% 0.027 104.6)
-
Step 200
200
#DDDCB4
oklch(88.5% 0.053 106.2)
-
Step 300
300
#C8C57B
oklch(80.9% 0.095 106.3)
-
Step 400
400 (this color)
#BBB31F
oklch(75% 0.153 106.2)
-
Step 500
500
#958E00
oklch(63.2% 0.135 106.2)
-
Step 600
600
#7D7700
oklch(55.7% 0.119 106.2)
-
Step 700
700
#696400
oklch(49.2% 0.105 106.3)
-
Step 800
800
#565100
oklch(42.6% 0.091 105.5)
-
Step 900
900
#474400
oklch(37.7% 0.081 106.8)
-
Step 950
950
#2A2800
oklch(27% 0.058 106.8)
#BBB31F 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) | #C3AC00 | 0.019 |
| Deuteranopia (no green cones) | #C6B22D | 0.019 |
| Tritanopia (no blue cones) | #C9A699 | 0.140 |
| Achromatopsia (no color) | #AFAFAF | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BBB31F
#BBB31F
oklch(75% 0.153 106.2)
- #A7A0FF
#A7A0FF
oklch(75% 0.135 286)
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 #BBB31F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Yellow #C2B709 ΔE 0.017
- Muddy Yellow #BFAC05 ΔE 0.018
- Mustard #CEB301 ΔE 0.028
- Mustard Green #A8B504 ΔE 0.030
- Dark Yellow #D5B60A ΔE 0.040
- Burnt Yellow #D5AB09 ΔE 0.042
- Pea #A4BF20 ΔE 0.043
- Mustard Yellow #D2BD0A ΔE 0.045
Use #BBB31F 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.