#667A8B
Closest named color: Grey Blue (#647D8E). oklch(57% 0.035 244.1), rgb(102, 122, 139).
Aa
Black text reads best on this color (4.72:1).
About this color
#667A8B is a medium-dark, muted blue. In OKLCH its lightness is 57%, its chroma 0.035 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.009 away. Black text reads best on it, at 4.72:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.72:1 |
| White text | 4.44:1 |
Values
| HEX | #667A8B |
| RGB | rgb(102, 122, 139) |
| HSL | hsl(208, 15%, 47%) |
| OKLCH | oklch(57% 0.035 244.1) |
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 #667A8B | 4.44:1 | AA large text | Lc -76.3 | Fine for body text |
| Black text on #667A8B | 4.72:1 | AA | Lc 33.2 | Non-text elements, placeholder text |
| #667A8B text on white | 4.44:1 | AA large text | Lc 70.9 | Content text, not long reading |
| #667A8B text on black | 4.72:1 | AA | Lc -30.8 | 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
#D4DADF
oklch(88.5% 0.009 242.9)
-
Step 300
300
#B8C2CA
oklch(80.9% 0.016 241.8)
-
Step 400
400
#94A3B0
oklch(70.8% 0.026 244.3)
-
Step 500
500
#798C9C
oklch(63.1% 0.033 243.7)
-
Step 600
600 (this color)
#667A8B
oklch(57% 0.035 244.1)
-
Step 700
700
#516372
oklch(49% 0.033 243.6)
-
Step 800
800
#43515D
oklch(42.8% 0.027 244.3)
-
Step 900
900
#38434C
oklch(37.7% 0.021 243)
-
Step 950
950
#21272D
oklch(26.9% 0.014 248.4)
#667A8B 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) | #737A8C | 0.018 |
| Deuteranopia (no green cones) | #6F768B | 0.016 |
| Tritanopia (no blue cones) | #5B7E7F | 0.029 |
| Achromatopsia (no color) | #777777 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667A8B
#667A8B
oklch(57% 0.035 244.1)
- #867362
#867362
oklch(56.9% 0.035 63.9)
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 #667A8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.009
- Battleship Grey #6B7C85 ΔE 0.014
- Battleship Gray #6C757D ΔE 0.022
- Slate Gray #708090 ΔE 0.023
- Steel Grey #6F828A ΔE 0.028
- Stormy Blue #507B9C ΔE 0.035
- Steel #738595 ΔE 0.038
- Metallic Blue #4F738E ΔE 0.039
Use #667A8B 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.