#637A67
Closest named color: Battleship Gray (#6C757D). oklch(55.5% 0.04 150), rgb(99, 122, 103).
Aa
White text reads best on this color (4.65:1).
About this color
#637A67 is a medium-dark, muted green. In OKLCH its lightness is 56%, its chroma 0.040 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Battleship Gray (#6C757D), ΔE 0.044 away. White text reads best on it, at 4.65:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.040) |
| Temperature | in between |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.51:1 |
| White text | 4.65:1 |
Values
| HEX | #637A67 |
| RGB | rgb(99, 122, 103) |
| HSL | hsl(130, 10%, 43%) |
| OKLCH | oklch(55.5% 0.04 150) |
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 #637A67 | 4.65:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #637A67 | 4.51:1 | AA | Lc 31.7 | Non-text elements, placeholder text |
| #637A67 text on white | 4.65:1 | AA | Lc 72.3 | Content text, not long reading |
| #637A67 text on black | 4.51:1 | AA | Lc -29.3 | 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
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E7EBE8
oklch(93.6% 0.006 153.8)
-
Step 200
200
#D5DBD6
oklch(88.5% 0.009 150.7)
-
Step 300
300
#B9C4BB
oklch(80.9% 0.017 151)
-
Step 400
400
#95A697
oklch(70.7% 0.029 148.7)
-
Step 500
500
#7A907E
oklch(63.1% 0.037 150.5)
-
Step 600
600 (this color)
#637A67
oklch(55.5% 0.04 150)
-
Step 700
700
#526756
oklch(49.1% 0.037 150.5)
-
Step 800
800
#435446
oklch(42.7% 0.031 150.1)
-
Step 900
900
#39453B
oklch(37.6% 0.023 150)
-
Step 950
950
#212923
oklch(27.1% 0.016 152.8)
#637A67 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) | #7A7666 | 0.034 |
| Deuteranopia (no green cones) | #767368 | 0.033 |
| Tritanopia (no blue cones) | #607975 | 0.023 |
| Achromatopsia (no color) | #747474 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637A67
#637A67
oklch(55.5% 0.04 150)
- #816B7E
#816B7E
oklch(55.5% 0.039 330.6)
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 #637A67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.044
- Grey Brown #7F7053 ΔE 0.047
- Battleship Grey #6B7C85 ΔE 0.048
- Dark Sage #598556 ΔE 0.049
- Medium Grey #7D7F7C ΔE 0.052
- Dim Gray #696969 ΔE 0.053
- Slate Green #658D6D ΔE 0.056
- Steel Grey #6F828A ΔE 0.057
Use #637A67 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.