#667E9D
Closest named color: Grey Blue (#647D8E). oklch(58.6% 0.055 255), rgb(102, 126, 157).
Aa
Black text reads best on this color (5.03:1).
About this color
#667E9D is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.055 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.023 away. Black text reads best on it, at 5.03:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.03:1 |
| White text | 4.16:1 |
Values
| HEX | #667E9D |
| RGB | rgb(102, 126, 157) |
| HSL | hsl(214, 22%, 51%) |
| OKLCH | oklch(58.6% 0.055 255) |
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 #667E9D | 4.16:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #667E9D | 5.03:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #667E9D text on white | 4.16:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #667E9D text on black | 5.03:1 | AA | Lc -33.0 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B6C2D1
oklch(80.9% 0.025 254)
-
Step 400
400
#90A2BA
oklch(70.6% 0.041 255.7)
-
Step 500
500
#758BA8
oklch(63% 0.051 255.4)
-
Step 600
600 (this color)
#667E9D
oklch(58.6% 0.055 255)
-
Step 700
700
#4D627E
oklch(49% 0.052 255.8)
-
Step 800
800
#3F5066
oklch(42.6% 0.043 255.1)
-
Step 900
900
#364353
oklch(37.8% 0.032 253.8)
-
Step 950
950
#202731
oklch(27% 0.021 257.3)
#667E9D 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) | #737F9E | 0.018 |
| Deuteranopia (no green cones) | #6D7A9C | 0.014 |
| Tritanopia (no blue cones) | #558588 | 0.049 |
| Achromatopsia (no color) | #7C7C7C | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667E9D
#667E9D
oklch(58.6% 0.055 255)
- #907857
#907857
oklch(58.7% 0.056 75.2)
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 #667E9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.023
- Slate Gray #708090 ΔE 0.026
- Stormy Blue #507B9C ΔE 0.029
- Dusty Blue #5A86AD ΔE 0.030
- Off Blue #5684AE ΔE 0.030
- Steel #738595 ΔE 0.033
- Lavender Gray #7E7F9A ΔE 0.034
- Battleship Grey #6B7C85 ΔE 0.036
Use #667E9D 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.