#637524
Closest named color: Muddy Green (#657432). oklch(53.1% 0.108 121), rgb(99, 117, 36).
Aa
White text reads best on this color (5.12:1).
About this color
#637524 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 53%, its chroma 0.108 and its hue 121°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Muddy Green (#657432), ΔE 0.015 away. White text reads best on it, at 5.12:1.
| Hue family | Yellows |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.108) |
| Temperature | in between |
| Nearest name | Muddy Green (#657432) |
| Black text | 4.10:1 |
| White text | 5.12:1 |
Values
| HEX | #637524 |
| RGB | rgb(99, 117, 36) |
| HSL | hsl(73, 53%, 30%) |
| OKLCH | oklch(53.1% 0.108 121) |
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 #637524 | 5.12:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #637524 | 4.10:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #637524 text on white | 5.12:1 | AA | Lc 75.2 | Fine for body text |
| #637524 text on black | 4.10:1 | AA large text | Lc -26.5 | Dividers and decoration only |
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 600.
-
Step 50
50
#F5F6F1
oklch(97.1% 0.007 115.7)
-
Step 100
100
#E8EBE1
oklch(93.5% 0.014 120.3)
-
Step 200
200
#D6DCC9
oklch(88.5% 0.026 121.2)
-
Step 300
300
#BCC6A3
oklch(80.9% 0.049 120.5)
-
Step 400
400
#99A871
oklch(70.6% 0.078 120.8)
-
Step 500
500
#81934B
oklch(63.2% 0.1 120.9)
-
Step 600
600 (this color)
#637524
oklch(53.1% 0.108 121)
-
Step 700
700
#58691F
oklch(49.1% 0.1 121.4)
-
Step 800
800
#48561C
oklch(42.8% 0.083 121.5)
-
Step 900
900
#3C471D
oklch(37.7% 0.065 121.8)
-
Step 950
950
#232912
oklch(26.8% 0.04 121.1)
#637524 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) | #7C6E19 | 0.040 |
| Deuteranopia (no green cones) | #7A6E2A | 0.041 |
| Tritanopia (no blue cones) | #696F65 | 0.091 |
| Achromatopsia (no color) | #6E6E6E | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637524
#637524
oklch(53.1% 0.108 121)
- #775CA0
#775CA0
oklch(53.1% 0.107 301.1)
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 #637524, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muddy Green #657432 ΔE 0.015
- Murky Green #6C7A0E ΔE 0.025
- Olive Green #677A04 ΔE 0.025
- Browny Green #6F6C0A ΔE 0.028
- Brown Green #706C11 ΔE 0.029
- Military Green #667C3E ΔE 0.029
- Dark Moss Green #606C38 ΔE 0.039
- Dark Olive Green #556B2F ΔE 0.041
Use #637524 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.