#667C8C
Closest named color: Grey Blue (#647D8E). oklch(57.5% 0.036 239.8), rgb(102, 124, 140).
Aa
Black text reads best on this color (4.82:1).
About this color
#667C8C is a medium-dark, muted blue. In OKLCH its lightness is 57%, its chroma 0.036 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.004 away. Black text reads best on it, at 4.82:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.82:1 |
| White text | 4.35:1 |
Values
| HEX | #667C8C |
| RGB | rgb(102, 124, 140) |
| HSL | hsl(205, 16%, 47%) |
| OKLCH | oklch(57.5% 0.036 239.8) |
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 #667C8C | 4.35:1 | AA large text | Lc -75.6 | Fine for body text |
| Black text on #667C8C | 4.82:1 | AA | Lc 33.9 | Non-text elements, placeholder text |
| #667C8C text on white | 4.35:1 | AA large text | Lc 70.1 | Content text, not long reading |
| #667C8C text on black | 4.82:1 | AA | Lc -31.5 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D4DADE
oklch(88.5% 0.009 236.6)
-
Step 300
300
#B8C2CA
oklch(80.9% 0.016 241.8)
-
Step 400
400
#93A3AF
oklch(70.7% 0.025 240.2)
-
Step 500
500
#788D9C
oklch(63.2% 0.033 239.2)
-
Step 600
600 (this color)
#667C8C
oklch(57.5% 0.036 239.8)
-
Step 700
700
#506472
oklch(49.2% 0.033 238.9)
-
Step 800
800
#42515D
oklch(42.7% 0.028 242.5)
-
Step 900
900
#37434C
oklch(37.6% 0.022 240.6)
-
Step 950
950
#21272C
oklch(26.9% 0.013 243.3)
#667C8C 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) | #757B8D | 0.021 |
| Deuteranopia (no green cones) | #70778C | 0.019 |
| Tritanopia (no blue cones) | #5B8081 | 0.028 |
| Achromatopsia (no color) | #797979 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667C8C
#667C8C
oklch(57.5% 0.036 239.8)
- #897464
#897464
oklch(57.4% 0.036 59.3)
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 #667C8C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.004
- Battleship Grey #6B7C85 ΔE 0.012
- Slate Gray #708090 ΔE 0.019
- Steel Grey #6F828A ΔE 0.023
- Battleship Gray #6C757D ΔE 0.026
- Steel #738595 ΔE 0.034
- Stormy Blue #507B9C ΔE 0.036
- Medium Grey #7D7F7C ΔE 0.042
Use #667C8C 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.