#647B6D
Closest named color: Battleship Gray (#6C757D). oklch(56% 0.034 158.4), rgb(100, 123, 109).
Aa
Black text reads best on this color (4.59:1).
About this color
#647B6D is a medium-dark, muted green. In OKLCH its lightness is 56%, its chroma 0.034 and its hue 158°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Battleship Gray (#6C757D), ΔE 0.037 away. Black text reads best on it, at 4.59:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.034) |
| Temperature | in between |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.59:1 |
| White text | 4.56:1 |
Values
| HEX | #647B6D |
| RGB | rgb(100, 123, 109) |
| HSL | hsl(143, 10%, 44%) |
| OKLCH | oklch(56% 0.034 158.4) |
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 #647B6D | 4.56:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #647B6D | 4.59:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #647B6D text on white | 4.56:1 | AA | Lc 71.7 | Content text, not long reading |
| #647B6D text on black | 4.59:1 | AA | Lc -29.9 | 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
#E7EBE9
oklch(93.6% 0.005 165)
-
Step 200
200
#D5DBD7
oklch(88.6% 0.008 157.1)
-
Step 300
300
#B9C4BD
oklch(81% 0.015 158.2)
-
Step 400
400
#94A69B
oklch(70.8% 0.026 158.9)
-
Step 500
500
#7A9082
oklch(63.2% 0.033 157.4)
-
Step 600
600 (this color)
#647B6D
oklch(56% 0.034 158.4)
-
Step 700
700
#52675A
oklch(49.2% 0.033 157.8)
-
Step 800
800
#43544A
oklch(42.8% 0.027 159.2)
-
Step 900
900
#39453D
oklch(37.7% 0.021 156.1)
-
Step 950
950
#212824
oklch(26.8% 0.012 160.4)
#647B6D 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) | #7B776C | 0.034 |
| Deuteranopia (no green cones) | #76746E | 0.032 |
| Tritanopia (no blue cones) | #607B77 | 0.016 |
| Achromatopsia (no color) | #767676 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647B6D
#647B6D
oklch(56% 0.034 158.4)
- #836D7B
#836D7B
oklch(56% 0.034 339.8)
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 #647B6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.037
- Battleship Grey #6B7C85 ΔE 0.039
- Medium Grey #7D7F7C ΔE 0.045
- Steel Grey #6F828A ΔE 0.048
- Grey Blue #647D8E ΔE 0.050
- Grey Brown #7F7053 ΔE 0.051
- Dim Gray #696969 ΔE 0.052
- Gray #808080 ΔE 0.053
Use #647B6D 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.