#647E7A
Closest named color: Battleship Grey (#6B7C85). oklch(57.1% 0.031 184.9), rgb(100, 126, 122).
Aa
Black text reads best on this color (4.80:1).
About this color
#647E7A is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.031 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Grey (#6B7C85), ΔE 0.023 away. Black text reads best on it, at 4.80:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Battleship Grey (#6B7C85) |
| Black text | 4.80:1 |
| White text | 4.36:1 |
Values
| HEX | #647E7A |
| RGB | rgb(100, 126, 122) |
| HSL | hsl(171, 12%, 44%) |
| OKLCH | oklch(57.1% 0.031 184.9) |
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 #647E7A | 4.36:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #647E7A | 4.80:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #647E7A text on white | 4.36:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #647E7A text on black | 4.80:1 | AA | Lc -31.4 | 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
#E7EBEA
oklch(93.7% 0.004 179.7)
-
Step 200
200
#D4DBDA
oklch(88.6% 0.008 186.9)
-
Step 300
300
#B7C4C2
oklch(81% 0.015 185.9)
-
Step 400
400
#92A5A2
oklch(70.6% 0.022 185.2)
-
Step 500
500
#778F8C
oklch(63% 0.028 187.2)
-
Step 600
600 (this color)
#647E7A
oklch(57.1% 0.031 184.9)
-
Step 700
700
#4F6663
oklch(49.1% 0.028 186.5)
-
Step 800
800
#415351
oklch(42.6% 0.023 188)
-
Step 900
900
#374543
oklch(37.7% 0.018 185.8)
-
Step 950
950
#202827
oklch(26.9% 0.011 187.3)
#647E7A 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) | #7B7B7A | 0.032 |
| Deuteranopia (no green cones) | #76777A | 0.031 |
| Tritanopia (no blue cones) | #5D7F7D | 0.009 |
| Achromatopsia (no color) | #797979 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647E7A
#647E7A
oklch(57.1% 0.031 184.9)
- #887175
#887175
oklch(57.2% 0.029 6.3)
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 #647E7A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Grey #6B7C85 ΔE 0.023
- Battleship Gray #6C757D ΔE 0.030
- Steel Grey #6F828A ΔE 0.030
- Grey Blue #647D8E ΔE 0.032
- Medium Grey #7D7F7C ΔE 0.036
- Slate Gray #708090 ΔE 0.039
- Gray #808080 ΔE 0.042
- Steel #738595 ΔE 0.048
Use #647E7A 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.