#667AA4
Closest named color: Stormy Blue (#507B9C). oklch(58% 0.069 264.6), rgb(102, 122, 164).
Aa
Black text reads best on this color (4.88:1).
About this color
#667AA4 is a medium-dark, muted blue. In OKLCH its lightness is 58%, its chroma 0.069 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.031 away. Black text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #667AA4 |
| RGB | rgb(102, 122, 164) |
| HSL | hsl(221, 25%, 52%) |
| OKLCH | oklch(58% 0.069 264.6) |
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 #667AA4 | 4.29:1 | AA large text | Lc -75.2 | Fine for body text |
| Black text on #667AA4 | 4.88:1 | AA | Lc 34.4 | Non-text elements, placeholder text |
| #667AA4 text on white | 4.29:1 | AA large text | Lc 69.7 | Content text, not long reading |
| #667AA4 text on black | 4.88:1 | AA | Lc -32.0 | 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
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D3D9E5
oklch(88.4% 0.018 264.5)
-
Step 300
300
#B7C1D5
oklch(80.9% 0.03 264.4)
-
Step 400
400
#91A1C1
oklch(70.8% 0.05 264.2)
-
Step 500
500
#7689B1
oklch(63% 0.065 264.8)
-
Step 600
600 (this color)
#667AA4
oklch(58% 0.069 264.6)
-
Step 700
700
#4E6086
oklch(49% 0.065 264.6)
-
Step 800
800
#404F6D
oklch(42.8% 0.054 263.8)
-
Step 900
900
#374158
oklch(37.6% 0.042 266.2)
-
Step 950
950
#202634
oklch(26.9% 0.028 266.5)
#667AA4 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) | #6C7DA6 | 0.012 |
| Deuteranopia (no green cones) | #6677A3 | 0.008 |
| Tritanopia (no blue cones) | #538388 | 0.063 |
| Achromatopsia (no color) | #7A7A7A | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667AA4
#667AA4
oklch(58% 0.069 264.6)
- #8D7749
#8D7749
oklch(57.9% 0.069 84.8)
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 #667AA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.031
- Off Blue #5684AE ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.034
- Grey Blue #647D8E ΔE 0.039
- Cerulean #457B9D ΔE 0.041
- Steel Blue #4682B4 ΔE 0.041
- Dull Blue #49759C ΔE 0.041
- Lavender Gray #7E7F9A ΔE 0.042
Use #667AA4 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.