#637528
Closest named color: Muddy Green (#657432). oklch(53.1% 0.104 121.3), rgb(99, 117, 40).
Aa
White text reads best on this color (5.11:1).
About this color
#637528 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 53%, its chroma 0.104 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 0.012 away. White text reads best on it, at 5.11:1.
| Hue family | Yellows |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.104) |
| Temperature | in between |
| Nearest name | Muddy Green (#657432) |
| Black text | 4.10:1 |
| White text | 5.11:1 |
Values
| HEX | #637528 |
| RGB | rgb(99, 117, 40) |
| HSL | hsl(74, 49%, 31%) |
| OKLCH | oklch(53.1% 0.104 121.3) |
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 #637528 | 5.11:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #637528 | 4.10:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #637528 text on white | 5.11:1 | AA | Lc 75.2 | Fine for body text |
| #637528 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
#BCC6A4
oklch(81% 0.048 120.8)
-
Step 400
400
#99A873
oklch(70.6% 0.075 121.2)
-
Step 500
500
#80924E
oklch(63% 0.095 121.4)
-
Step 600
600 (this color)
#637528
oklch(53.1% 0.104 121.3)
-
Step 700
700
#586922
oklch(49.1% 0.098 121.6)
-
Step 800
800
#48561E
oklch(42.8% 0.082 121.8)
-
Step 900
900
#3C471F
oklch(37.8% 0.063 122.2)
-
Step 950
950
#232913
oklch(26.8% 0.038 121.5)
#637528 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) | #7C6E1E | 0.040 |
| Deuteranopia (no green cones) | #7A6E2D | 0.041 |
| Tritanopia (no blue cones) | #686F65 | 0.087 |
| Achromatopsia (no color) | #6E6E6E | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637528
#637528
oklch(53.1% 0.104 121.3)
- #775D9F
#775D9F
oklch(53.2% 0.104 301.1)
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 #637528, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muddy Green #657432 ΔE 0.012
- Murky Green #6C7A0E ΔE 0.027
- Military Green #667C3E ΔE 0.027
- Olive Green #677A04 ΔE 0.027
- Browny Green #6F6C0A ΔE 0.029
- Brown Green #706C11 ΔE 0.029
- Dark Moss Green #606C38 ΔE 0.036
- Dark Olive Green #556B2F ΔE 0.039
Use #637528 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.