#B9C73F
Closest named color: Mustard Yellow (#D2BD0A). oklch(79.4% 0.156 115.1), rgb(185, 199, 63).
Aa
Black text reads best on this color (11.30:1).
About this color
#B9C73F is a light, vivid yellow. In OKLCH its lightness is 79%, its chroma 0.156 and its hue 115°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mustard Yellow (#D2BD0A), ΔE 0.039 away. Black text reads best on it, at 11.30:1.
| Hue family | Yellows |
| Lightness | light (79%) |
| Chroma | vivid (0.156) |
| Temperature | in between |
| Nearest name | Mustard Yellow (#D2BD0A) |
| Black text | 11.30:1 |
| White text | 1.85:1 |
Values
| HEX | #B9C73F |
| RGB | rgb(185, 199, 63) |
| HSL | hsl(66, 55%, 51%) |
| OKLCH | oklch(79.4% 0.156 115.1) |
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 #B9C73F | 1.85:1 | Fails | Lc -39.1 | Non-text elements, placeholder text |
| Black text on #B9C73F | 11.30:1 | AAA | Lc 69.0 | Content text, not long reading |
| #B9C73F text on white | 1.85:1 | Fails | Lc 34.9 | Non-text elements, placeholder text |
| #B9C73F text on black | 11.30:1 | AAA | Lc -67.6 | 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
#F5F7E8
oklch(97.1% 0.02 112.9)
-
Step 100
100
#E8EECC
oklch(93.6% 0.045 115.4)
-
Step 200
200
#D7E19E
oklch(88.6% 0.088 115.1)
-
Step 300
300 (this color)
#B9C73F
oklch(79.4% 0.156 115.1)
-
Step 400
400
#9EAB00
oklch(70.7% 0.16 115.1)
-
Step 500
500
#879300
oklch(63.2% 0.144 115.4)
-
Step 600
600
#717B00
oklch(55.5% 0.126 115.3)
-
Step 700
700
#5F6700
oklch(49% 0.111 115)
-
Step 800
800
#4E5500
oklch(42.8% 0.097 115.1)
-
Step 900
900
#404600
oklch(37.6% 0.085 115.2)
-
Step 950
950
#262A00
oklch(27.2% 0.062 115.2)
#B9C73F 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) | #D5BD2A | 0.043 |
| Deuteranopia (no green cones) | #D4BF49 | 0.045 |
| Tritanopia (no blue cones) | #C5BCAC | 0.137 |
| Achromatopsia (no color) | #BEBEBE | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B9C73F
#B9C73F
oklch(79.4% 0.156 115.1)
- #C1ADFF
#C1ADFF
oklch(79.5% 0.116 294.8)
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 #B9C73F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Yellow #D2BD0A ΔE 0.039
- Olive Yellow #C2B709 ΔE 0.041
- Pea #A4BF20 ΔE 0.041
- Yellow Green #9ACD32 ΔE 0.045
- Light Olive Green #A4BE5C ΔE 0.047
- Light Moss Green #A6C875 ΔE 0.050
- Light Olive #ACBF69 ΔE 0.050
- Pale Olive Green #B1D27B ΔE 0.052
Use #B9C73F 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.