#667DB4
Closest named color: Off Blue (#5684AE). oklch(59.4% 0.089 266.4), rgb(102, 125, 180).
Aa
Black text reads best on this color (5.15:1).
About this color
#667DB4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.089 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.029 away. Black text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #667DB4 |
| RGB | rgb(102, 125, 180) |
| HSL | hsl(222, 34%, 55%) |
| OKLCH | oklch(59.4% 0.089 266.4) |
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 #667DB4 | 4.07:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #667DB4 | 5.15:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #667DB4 text on white | 4.07:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #667DB4 text on black | 5.15:1 | AA | Lc -33.8 | 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 500.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D2D9EA
oklch(88.5% 0.025 267.9)
-
Step 300
300
#B4C1DE
oklch(81% 0.043 266.3)
-
Step 400
400
#8DA0CD
oklch(70.7% 0.07 266.8)
-
Step 500
500 (this color)
#667DB4
oklch(59.4% 0.089 266.4)
-
Step 600
600
#5971AC
oklch(55.6% 0.097 266.5)
-
Step 700
700
#495F94
oklch(49.2% 0.089 266.1)
-
Step 800
800
#3C4D78
oklch(42.6% 0.075 266.8)
-
Step 900
900
#334161
oklch(37.8% 0.058 265.6)
-
Step 950
950
#1E2639
oklch(27% 0.037 266.4)
#667DB4 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) | #6982B6 | 0.015 |
| Deuteranopia (no green cones) | #627BB3 | 0.008 |
| Tritanopia (no blue cones) | #4B8891 | 0.078 |
| Achromatopsia (no color) | #7E7E7E | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667DB4
#667DB4
oklch(59.4% 0.089 266.4)
- #967B3B
#967B3B
oklch(59.5% 0.089 86.6)
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 #667DB4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.029
- Dusty Blue #5A86AD ΔE 0.033
- Cool Blue #4984B8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.036
- Faded Blue #658CBB ΔE 0.041
- Stormy Blue #507B9C ΔE 0.048
- Lavender Gray #7E7F9A ΔE 0.052
- Cerulean #457B9D ΔE 0.055
Use #667DB4 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.