#637665
Closest named color: Battleship Gray (#6C757D). oklch(54.5% 0.034 148), rgb(99, 118, 101).
Aa
White text reads best on this color (4.87:1).
About this color
#637665 is a medium-dark, muted green. In OKLCH its lightness is 55%, its chroma 0.034 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Battleship Gray (#6C757D), ΔE 0.042 away. White text reads best on it, at 4.87:1.
| Hue family | Greens |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.034) |
| Temperature | in between |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.30:1 |
| White text | 4.87:1 |
Values
| HEX | #637665 |
| RGB | rgb(99, 118, 101) |
| HSL | hsl(126, 9%, 43%) |
| OKLCH | oklch(54.5% 0.034 148) |
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 #637665 | 4.87:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #637665 | 4.30:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #637665 text on white | 4.87:1 | AA | Lc 73.8 | Content text, not long reading |
| #637665 text on black | 4.30:1 | AA large text | Lc -27.9 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E8EBE8
oklch(93.7% 0.005 145.5)
-
Step 200
200
#D5DBD6
oklch(88.5% 0.009 150.7)
-
Step 300
300
#BAC3BB
oklch(80.8% 0.015 148.7)
-
Step 400
400
#97A598
oklch(70.7% 0.024 147.3)
-
Step 500
500
#7D8F7F
oklch(63.1% 0.031 148.4)
-
Step 600
600 (this color)
#637665
oklch(54.5% 0.034 148)
-
Step 700
700
#556657
oklch(49.1% 0.031 148.4)
-
Step 800
800
#455347
oklch(42.6% 0.026 149.2)
-
Step 900
900
#3A453B
oklch(37.7% 0.022 147.6)
-
Step 950
950
#222823
oklch(26.9% 0.013 150.2)
#637665 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) | #777264 | 0.030 |
| Deuteranopia (no green cones) | #737066 | 0.029 |
| Tritanopia (no blue cones) | #617571 | 0.020 |
| Achromatopsia (no color) | #717171 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637665
#637665
oklch(54.5% 0.034 148)
- #7C697B
#7C697B
oklch(54.5% 0.036 327.7)
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 #637665, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.042
- Dim Gray #696969 ΔE 0.042
- Grey Brown #7F7053 ΔE 0.045
- Battleship Grey #6B7C85 ΔE 0.050
- Dark Taupe #7F684E ΔE 0.055
- Medium Grey #7D7F7C ΔE 0.057
- Dark Sage #598556 ΔE 0.058
- Dull Brown #876E4B ΔE 0.059
Use #637665 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.