#BCB900
Closest named color: Olive Yellow (#C2B709). oklch(76.3% 0.165 108.6), rgb(188, 185, 0).
Aa
Black text reads best on this color (10.07:1).
About this color
#BCB900 is a medium-light, vivid yellow. In OKLCH its lightness is 76%, its chroma 0.165 and its hue 109°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Yellow (#C2B709), ΔE 0.011 away. Black text reads best on it, at 10.07:1.
| Hue family | Yellows |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.165) |
| Temperature | warm |
| Nearest name | Olive Yellow (#C2B709) |
| Black text | 10.07:1 |
| White text | 2.08:1 |
Values
| HEX | #BCB900 |
| RGB | rgb(188, 185, 0) |
| HSL | hsl(59, 100%, 37%) |
| OKLCH | oklch(76.3% 0.165 108.6) |
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 #BCB900 | 2.08:1 | Fails | Lc -45.1 | Large or bold text, headings |
| Black text on #BCB900 | 10.07:1 | AAA | Lc 63.4 | Content text, not long reading |
| #BCB900 text on white | 2.08:1 | Fails | Lc 40.5 | Non-text elements, placeholder text |
| #BCB900 text on black | 10.07:1 | AAA | Lc -61.8 | 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
#F6F7E6
oklch(97.1% 0.022 109.5)
-
Step 100
100
#ECEDC9
oklch(93.6% 0.047 108.6)
-
Step 200
200
#DEDE97
oklch(88.4% 0.091 108.1)
-
Step 300
300 (this color)
#BCB900
oklch(76.3% 0.165 108.6)
-
Step 400
400
#AAA700
oklch(70.8% 0.153 108.5)
-
Step 500
500
#918F00
oklch(63.1% 0.137 108.8)
-
Step 600
600
#7A7800
oklch(55.6% 0.12 108.6)
-
Step 700
700
#666500
oklch(49.1% 0.107 109.1)
-
Step 800
800
#545200
oklch(42.7% 0.092 108.1)
-
Step 900
900
#464400
oklch(37.6% 0.081 107.8)
-
Step 950
950
#292800
oklch(26.9% 0.058 108.3)
#BCB900 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) | #C9B100 | 0.027 |
| Deuteranopia (no green cones) | #CCB621 | 0.028 |
| Tritanopia (no blue cones) | #CBAC9D | 0.150 |
| Achromatopsia (no color) | #B4B4B4 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BCB900
#BCB900
oklch(76.3% 0.165 108.6)
- #AFA4FF
#AFA4FF
oklch(76.3% 0.129 288.5)
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 #BCB900, closest first.
No curated palette has a color within ΔE 0.04 of #BCB900.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Yellow #C2B709 ΔE 0.011
- Mustard #CEB301 ΔE 0.030
- Mustard Green #A8B504 ΔE 0.031
- Pea #A4BF20 ΔE 0.034
- Muddy Yellow #BFAC05 ΔE 0.034
- Mustard Yellow #D2BD0A ΔE 0.035
- Dark Yellow #D5B60A ΔE 0.038
- Bright Olive #9CBB04 ΔE 0.044
Use #BCB900 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.