#637257
Closest named color: Dark Moss Green (#606C38). oklch(53.2% 0.045 131.5), rgb(99, 114, 87).
Aa
White text reads best on this color (5.15:1).
About this color
#637257 is a medium-dark, muted green. In OKLCH its lightness is 53%, its chroma 0.045 and its hue 131°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.041 away. White text reads best on it, at 5.15:1.
| Hue family | Greens |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.045) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 4.07:1 |
| White text | 5.15:1 |
Values
| HEX | #637257 |
| RGB | rgb(99, 114, 87) |
| HSL | hsl(93, 13%, 39%) |
| OKLCH | oklch(53.2% 0.045 131.5) |
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 #637257 | 5.15:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #637257 | 4.07:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #637257 text on white | 5.15:1 | AA | Lc 75.5 | Fine for body text |
| #637257 text on black | 4.07:1 | AA large text | Lc -26.2 | 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
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#E8EBE7
oklch(93.7% 0.006 137.8)
-
Step 200
200
#D6DBD3
oklch(88.5% 0.012 133.4)
-
Step 300
300
#BCC3B6
oklch(80.8% 0.02 130.2)
-
Step 400
400
#99A590
oklch(70.6% 0.033 131.7)
-
Step 500
500
#818F75
oklch(63.1% 0.041 130.7)
-
Step 600
600 (this color)
#637257
oklch(53.2% 0.045 131.5)
-
Step 700
700
#58664D
oklch(49.1% 0.042 131.6)
-
Step 800
800
#48533F
oklch(42.6% 0.035 131.2)
-
Step 900
900
#3C4536
oklch(37.7% 0.028 132.9)
-
Step 950
950
#232820
oklch(26.9% 0.016 133.7)
#637257 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) | #756E55 | 0.028 |
| Deuteranopia (no green cones) | #726D58 | 0.026 |
| Tritanopia (no blue cones) | #64706B | 0.033 |
| Achromatopsia (no color) | #6D6D6D | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637257
#637257
oklch(53.2% 0.045 131.5)
- #756580
#756580
oklch(53.2% 0.046 311.4)
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 #637257, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.041
- Grey Brown #7F7053 ΔE 0.042
- Dim Gray #696969 ΔE 0.046
- Dark Taupe #7F684E ΔE 0.048
- Muddy Green #657432 ΔE 0.049
- Military Green #667C3E ΔE 0.052
- Dull Brown #876E4B ΔE 0.055
- Dark Olive Green #556B2F ΔE 0.058
Use #637257 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.