#647C74
Closest named color: Battleship Grey (#6B7C85). oklch(56.5% 0.031 172.9), rgb(100, 124, 116).
Aa
Black text reads best on this color (4.67:1).
About this color
#647C74 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 56%, its chroma 0.031 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Grey (#6B7C85), ΔE 0.029 away. Black text reads best on it, at 4.67:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Battleship Grey (#6B7C85) |
| Black text | 4.67:1 |
| White text | 4.48:1 |
Values
| HEX | #647C74 |
| RGB | rgb(100, 124, 116) |
| HSL | hsl(160, 11%, 44%) |
| OKLCH | oklch(56.5% 0.031 172.9) |
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 #647C74 | 4.48:1 | AA large text | Lc -76.6 | Fine for body text |
| Black text on #647C74 | 4.67:1 | AA | Lc 32.9 | Non-text elements, placeholder text |
| #647C74 text on white | 4.48:1 | AA large text | Lc 71.2 | Content text, not long reading |
| #647C74 text on black | 4.67:1 | AA | Lc -30.5 | Non-text elements, placeholder text |
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
#D4DBD8
oklch(88.5% 0.009 168.7)
-
Step 300
300
#B8C4C0
oklch(81% 0.014 174.1)
-
Step 400
400
#93A59F
oklch(70.6% 0.022 173.6)
-
Step 500
500
#798F88
oklch(63.1% 0.027 174.2)
-
Step 600
600 (this color)
#647C74
oklch(56.5% 0.031 172.9)
-
Step 700
700
#51665F
oklch(49.1% 0.028 172.8)
-
Step 800
800
#42534E
oklch(42.6% 0.023 175.4)
-
Step 900
900
#384541
oklch(37.7% 0.018 174.7)
-
Step 950
950
#212826
oklch(26.9% 0.011 176.4)
#647C74 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) | #7A7974 | 0.031 |
| Deuteranopia (no green cones) | #767575 | 0.032 |
| Tritanopia (no blue cones) | #5F7D7A | 0.010 |
| Achromatopsia (no color) | #777777 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647C74
#647C74
oklch(56.5% 0.031 172.9)
- #856F77
#856F77
oklch(56.5% 0.03 354.2)
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 #647C74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Grey #6B7C85 ΔE 0.029
- Battleship Gray #6C757D ΔE 0.031
- Steel Grey #6F828A ΔE 0.039
- Medium Grey #7D7F7C ΔE 0.039
- Grey Blue #647D8E ΔE 0.040
- Gray #808080 ΔE 0.047
- Slate Gray #708090 ΔE 0.047
- Dim Gray #696969 ΔE 0.053
Use #647C74 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.