#667DB1
Closest named color: Off Blue (#5684AE). oklch(59.3% 0.084 265.6), rgb(102, 125, 177).
Aa
Black text reads best on this color (5.13:1).
About this color
#667DB1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.084 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.027 away. Black text reads best on it, at 5.13:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.13:1 |
| White text | 4.09:1 |
Values
| HEX | #667DB1 |
| RGB | rgb(102, 125, 177) |
| HSL | hsl(222, 32%, 55%) |
| OKLCH | oklch(59.3% 0.084 265.6) |
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 #667DB1 | 4.09:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #667DB1 | 5.13:1 | AA | Lc 36.1 | Non-text elements, placeholder text |
| #667DB1 text on white | 4.09:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #667DB1 text on black | 5.13:1 | AA | Lc -33.6 | 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
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2D9E8
oklch(88.4% 0.022 265.8)
-
Step 300
300
#B5C1DA
oklch(81% 0.038 265.1)
-
Step 400
400
#8FA0C7
oklch(70.6% 0.06 266.4)
-
Step 500
500
#7389B9
oklch(63.2% 0.077 265.3)
-
Step 600
600 (this color)
#667DB1
oklch(59.3% 0.084 265.6)
-
Step 700
700
#4B5F8E
oklch(49% 0.08 266)
-
Step 800
800
#3E4E73
oklch(42.7% 0.065 265.8)
-
Step 900
900
#35415D
oklch(37.7% 0.051 266.2)
-
Step 950
950
#1F2636
oklch(26.9% 0.032 266.1)
#667DB1 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) | #6B81B3 | 0.014 |
| Deuteranopia (no green cones) | #637AB0 | 0.010 |
| Tritanopia (no blue cones) | #4C888F | 0.077 |
| Achromatopsia (no color) | #7D7D7D | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667DB1
#667DB1
oklch(59.3% 0.084 265.6)
- #957A3F
#957A3F
oklch(59.2% 0.085 85.1)
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 #667DB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.027
- Dusty Blue #5A86AD ΔE 0.030
- Cool Blue #4984B8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.035
- Faded Blue #658CBB ΔE 0.041
- Stormy Blue #507B9C ΔE 0.044
- Lavender Gray #7E7F9A ΔE 0.049
- Cerulean #457B9D ΔE 0.051
Use #667DB1 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.