#667CA1
Closest named color: Stormy Blue (#507B9C). oklch(58.3% 0.063 260.7), rgb(102, 124, 161).
Aa
Black text reads best on this color (4.96:1).
About this color
#667CA1 is a medium-dark, muted blue. In OKLCH its lightness is 58%, its chroma 0.063 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.029 away. Black text reads best on it, at 4.96:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.96:1 |
| White text | 4.23:1 |
Values
| HEX | #667CA1 |
| RGB | rgb(102, 124, 161) |
| HSL | hsl(218, 24%, 52%) |
| OKLCH | oklch(58.3% 0.063 260.7) |
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 #667CA1 | 4.23:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #667CA1 | 4.96:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #667CA1 text on white | 4.23:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #667CA1 text on black | 4.96:1 | AA | Lc -32.5 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D3D9E4
oklch(88.4% 0.016 262.7)
-
Step 300
300
#B6C1D3
oklch(80.8% 0.028 260.3)
-
Step 400
400
#91A1BD
oklch(70.6% 0.045 261.6)
-
Step 500
500
#768AAD
oklch(63.1% 0.058 261.5)
-
Step 600
600 (this color)
#667CA1
oklch(58.3% 0.063 260.7)
-
Step 700
700
#4E6182
oklch(49.1% 0.058 261.2)
-
Step 800
800
#404F6A
oklch(42.6% 0.049 261.9)
-
Step 900
900
#364256
oklch(37.7% 0.038 260.5)
-
Step 950
950
#202732
oklch(27.1% 0.023 259.3)
#667CA1 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) | #6F7EA3 | 0.014 |
| Deuteranopia (no green cones) | #6979A0 | 0.009 |
| Tritanopia (no blue cones) | #548489 | 0.055 |
| Achromatopsia (no color) | #7B7B7B | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667CA1
#667CA1
oklch(58.3% 0.063 260.7)
- #8F7850
#8F7850
oklch(58.5% 0.063 80.8)
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 #667CA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.029
- Off Blue #5684AE ΔE 0.029
- Dusty Blue #5A86AD ΔE 0.030
- Grey Blue #647D8E ΔE 0.031
- Slate Gray #708090 ΔE 0.034
- Lavender Gray #7E7F9A ΔE 0.037
- Cerulean #457B9D ΔE 0.039
- Steel #738595 ΔE 0.041
Use #667CA1 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.