#667BB5
Closest named color: Off Blue (#5684AE). oklch(59.1% 0.093 268.3), rgb(102, 123, 181).
Aa
Black text reads best on this color (5.06:1).
About this color
#667BB5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.093 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.034 away. Black text reads best on it, at 5.06:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.06:1 |
| White text | 4.14:1 |
Values
| HEX | #667BB5 |
| RGB | rgb(102, 123, 181) |
| HSL | hsl(224, 35%, 55%) |
| OKLCH | oklch(59.1% 0.093 268.3) |
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 #667BB5 | 4.14:1 | AA large text | Lc -74.0 | Content text, not long reading |
| Black text on #667BB5 | 5.06:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #667BB5 text on white | 4.14:1 | AA large text | Lc 68.5 | Content text, not long reading |
| #667BB5 text on black | 5.06:1 | AA | Lc -33.2 | 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
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D2D9E9
oklch(88.5% 0.023 266.9)
-
Step 300
300
#B5C0DC
oklch(80.8% 0.041 268.5)
-
Step 400
400
#8FA0CB
oklch(70.8% 0.066 267.9)
-
Step 500
500
#7388BE
oklch(63.2% 0.085 267.6)
-
Step 600
600 (this color)
#667BB5
oklch(59.1% 0.093 268.3)
-
Step 700
700
#4C5E92
oklch(49.1% 0.087 268.6)
-
Step 800
800
#3E4D76
oklch(42.6% 0.071 268)
-
Step 900
900
#35405F
oklch(37.6% 0.055 268.7)
-
Step 950
950
#1F2638
oklch(27.1% 0.035 267.7)
#667BB5 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) | #6680B7 | 0.014 |
| Deuteranopia (no green cones) | #5F79B4 | 0.011 |
| Tritanopia (no blue cones) | #4A8790 | 0.083 |
| Achromatopsia (no color) | #7C7C7C | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667BB5
#667BB5
oklch(59.1% 0.093 268.3)
- #947A36
#947A36
oklch(59% 0.092 88.3)
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 #667BB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.034
- Cool Blue #4984B8 ΔE 0.037
- Steel Blue #4682B4 ΔE 0.038
- Dusty Blue #5A86AD ΔE 0.038
- Faded Blue #658CBB ΔE 0.046
- Stormy Blue #507B9C ΔE 0.050
- Windows Blue #3778BF ΔE 0.053
- Dull Blue #49759C ΔE 0.056
Use #667BB5 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.