#667BAA
Closest named color: Off Blue (#5684AE). oklch(58.5% 0.077 265.6), rgb(102, 123, 170).
Aa
Black text reads best on this color (4.97:1).
About this color
#667BAA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.077 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 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 4.97:1 |
| White text | 4.21:1 |
Values
| HEX | #667BAA |
| RGB | rgb(102, 123, 170) |
| HSL | hsl(221, 29%, 53%) |
| OKLCH | oklch(58.5% 0.077 265.6) |
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 #667BAA | 4.21:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #667BAA | 4.97:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #667BAA text on white | 4.21:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #667BAA text on black | 4.97:1 | AA | Lc -32.6 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D3D9E6
oklch(88.5% 0.019 266)
-
Step 300
300
#B6C1D8
oklch(81% 0.035 265.2)
-
Step 400
400
#90A0C4
oklch(70.6% 0.056 266.2)
-
Step 500
500
#7589B5
oklch(63.1% 0.071 265.5)
-
Step 600
600 (this color)
#667BAA
oklch(58.5% 0.077 265.6)
-
Step 700
700
#4D608A
oklch(49.2% 0.072 265.2)
-
Step 800
800
#3F4E70
oklch(42.6% 0.06 265.7)
-
Step 900
900
#36415A
oklch(37.7% 0.045 265.9)
-
Step 950
950
#202635
oklch(27% 0.029 267.5)
#667BAA 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) | #6B7FAC | 0.014 |
| Deuteranopia (no green cones) | #6478A9 | 0.009 |
| Tritanopia (no blue cones) | #50858B | 0.070 |
| Achromatopsia (no color) | #7B7B7B | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667BAA
#667BAA
oklch(58.5% 0.077 265.6)
- #907944
#907944
oklch(58.6% 0.077 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 #667BAA, 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 0.032
- Stormy Blue #507B9C ΔE 0.036
- Steel Blue #4682B4 ΔE 0.038
- Cool Blue #4984B8 ΔE 0.039
- Lavender Gray #7E7F9A ΔE 0.045
- Cerulean #457B9D ΔE 0.045
- Dull Blue #49759C ΔE 0.046
Use #667BAA 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.