#667D90
Closest named color: Grey Blue (#647D8E). oklch(57.8% 0.04 243.4), rgb(102, 125, 144).
Aa
Black text reads best on this color (4.90:1).
About this color
#667D90 is a medium-dark, muted blue. In OKLCH its lightness is 58%, its chroma 0.040 and its hue 243°. 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 4.90:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.90:1 |
| White text | 4.28:1 |
Values
| HEX | #667D90 |
| RGB | rgb(102, 125, 144) |
| HSL | hsl(207, 17%, 48%) |
| OKLCH | oklch(57.8% 0.04 243.4) |
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 #667D90 | 4.28:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #667D90 | 4.90:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #667D90 text on white | 4.28:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #667D90 text on black | 4.90:1 | AA | Lc -32.0 | 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
#B7C2CC
oklch(80.9% 0.019 245.4)
-
Step 400
400
#92A3B1
oklch(70.7% 0.028 242.9)
-
Step 500
500
#778C9E
oklch(63% 0.036 244.3)
-
Step 600
600 (this color)
#667D90
oklch(57.8% 0.04 243.4)
-
Step 700
700
#4F6374
oklch(49% 0.037 244.3)
-
Step 800
800
#41515F
oklch(42.7% 0.031 245)
-
Step 900
900
#37434E
oklch(37.7% 0.025 246.2)
-
Step 950
950
#20272D
oklch(26.8% 0.015 244.2)
#667D90 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) | #757D91 | 0.021 |
| Deuteranopia (no green cones) | #707890 | 0.019 |
| Tritanopia (no blue cones) | #5A8283 | 0.033 |
| Achromatopsia (no color) | #7A7A7A | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667D90
#667D90
oklch(57.8% 0.04 243.4)
- #8B7562
#8B7562
oklch(57.8% 0.039 62.7)
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 #667D90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.004
- Slate Gray #708090 ΔE 0.017
- Battleship Grey #6B7C85 ΔE 0.017
- Steel Grey #6F828A ΔE 0.024
- Steel #738595 ΔE 0.030
- Battleship Gray #6C757D ΔE 0.031
- Stormy Blue #507B9C ΔE 0.033
- Lavender Gray #7E7F9A ΔE 0.038
Use #667D90 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.