#A3B640
Closest named color: Mustard Green (#A8B504). oklch(73.9% 0.143 117.9), rgb(163, 182, 64).
Aa
Black text reads best on this color (9.32:1).
About this color
#A3B640 is a medium-light, vivid yellow. In OKLCH its lightness is 74%, its chroma 0.143 and its hue 118°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mustard Green (#A8B504), ΔE 0.024 away. Black text reads best on it, at 9.32:1.
| Hue family | Yellows |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Mustard Green (#A8B504) |
| Black text | 9.32:1 |
| White text | 2.25:1 |
Values
| HEX | #A3B640 |
| RGB | rgb(163, 182, 64) |
| HSL | hsl(70, 48%, 48%) |
| OKLCH | oklch(73.9% 0.143 117.9) |
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 #A3B640 | 2.25:1 | Fails | Lc -49.1 | Large or bold text, headings |
| Black text on #A3B640 | 9.32:1 | AAA | Lc 59.7 | Large or bold text, headings |
| #A3B640 text on white | 2.25:1 | Fails | Lc 44.3 | Non-text elements, placeholder text |
| #A3B640 text on black | 9.32:1 | AAA | Lc -57.8 | 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
#F4F7EE
oklch(97.1% 0.012 121.7)
-
Step 100
100
#E8EDD9
oklch(93.7% 0.027 118.3)
-
Step 200
200
#D6DEB9
oklch(88.5% 0.05 117.3)
-
Step 300
300
#BBC986
oklch(80.9% 0.09 118.1)
-
Step 400
400 (this color)
#A3B640
oklch(73.9% 0.143 117.9)
-
Step 500
500
#839400
oklch(63.1% 0.146 117.6)
-
Step 600
600
#6D7C00
oklch(55.4% 0.129 117.8)
-
Step 700
700
#5C6900
oklch(49.2% 0.114 117.9)
-
Step 800
800
#4B5600
oklch(42.8% 0.1 117.9)
-
Step 900
900
#3E4700
oklch(37.7% 0.087 117.6)
-
Step 950
950
#242A00
oklch(27% 0.063 117.7)
#A3B640 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) | #C2AC30 | 0.047 |
| Deuteranopia (no green cones) | #C0AD48 | 0.049 |
| Tritanopia (no blue cones) | #ACAC9E | 0.124 |
| Achromatopsia (no color) | #ADADAD | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A3B640
#A3B640
oklch(73.9% 0.143 117.9)
- #B695F8
#B695F8
oklch(73.9% 0.143 298.2)
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 #A3B640, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Green #A8B504 ΔE 0.024
- Light Olive Green #A4BE5C ΔE 0.028
- Avocado #90B134 ΔE 0.032
- Pea #A4BF20 ΔE 0.035
- Bright Olive #9CBB04 ΔE 0.035
- Icky Green #8FAE22 ΔE 0.041
- Muddy Yellow #BFAC05 ΔE 0.044
- Light Olive #ACBF69 ΔE 0.044
Use #A3B640 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.