#667BAC
Closest named color: Off Blue (#5684AE). oklch(58.6% 0.08 266.2), rgb(102, 123, 172).
Aa
Black text reads best on this color (4.99:1).
About this color
#667BAC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.080 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 4.99:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 4.99:1 |
| White text | 4.20:1 |
Values
| HEX | #667BAC |
| RGB | rgb(102, 123, 172) |
| HSL | hsl(222, 30%, 54%) |
| OKLCH | oklch(58.6% 0.08 266.2) |
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 #667BAC | 4.20:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #667BAC | 4.99:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #667BAC text on white | 4.20:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #667BAC text on black | 4.99:1 | AA | Lc -32.7 | 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
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D3D9E7
oklch(88.5% 0.02 267.3)
-
Step 300
300
#B6C1D9
oklch(81% 0.036 265.9)
-
Step 400
400
#90A0C5
oklch(70.6% 0.057 266.6)
-
Step 500
500
#7589B7
oklch(63.2% 0.073 266.2)
-
Step 600
600 (this color)
#667BAC
oklch(58.6% 0.08 266.2)
-
Step 700
700
#4D5F8B
oklch(49% 0.074 266.7)
-
Step 800
800
#3F4E71
oklch(42.7% 0.062 266.1)
-
Step 900
900
#36415B
oklch(37.7% 0.047 266.5)
-
Step 950
950
#1F2635
oklch(26.9% 0.03 265.1)
#667BAC 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) | #6A7FAE | 0.013 |
| Deuteranopia (no green cones) | #6379AB | 0.007 |
| Tritanopia (no blue cones) | #4F858C | 0.071 |
| Achromatopsia (no color) | #7B7B7B | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667BAC
#667BAC
oklch(58.6% 0.08 266.2)
- #917942
#917942
oklch(58.6% 0.079 86.3)
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 #667BAC, 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
- Steel Blue #4682B4 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.038
- Stormy Blue #507B9C ΔE 0.038
- Lavender Gray #7E7F9A ΔE 0.047
- Cerulean #457B9D ΔE 0.047
- Dull Blue #49759C ΔE 0.047
Use #667BAC 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.