#667DA9
Closest named color: Off Blue (#5684AE). oklch(58.9% 0.073 263), rgb(102, 125, 169).
Aa
Black text reads best on this color (5.07:1).
About this color
#667DA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.073 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.025 away. Black text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.07:1 |
| White text | 4.14:1 |
Values
| HEX | #667DA9 |
| RGB | rgb(102, 125, 169) |
| HSL | hsl(219, 28%, 53%) |
| OKLCH | oklch(58.9% 0.073 263) |
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 #667DA9 | 4.14:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #667DA9 | 5.07:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #667DA9 text on white | 4.14:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #667DA9 text on black | 5.07:1 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D3D9E6
oklch(88.5% 0.019 266)
-
Step 300
300
#B6C1D7
oklch(80.9% 0.033 264.4)
-
Step 400
400
#8FA1C2
oklch(70.6% 0.053 262.5)
-
Step 500
500
#748AB3
oklch(63.2% 0.067 262.6)
-
Step 600
600 (this color)
#667DA9
oklch(58.9% 0.073 263)
-
Step 700
700
#4C6088
oklch(49% 0.069 263.6)
-
Step 800
800
#3F4F6E
oklch(42.8% 0.056 263.2)
-
Step 900
900
#354259
oklch(37.8% 0.043 261.6)
-
Step 950
950
#1F2634
oklch(26.8% 0.028 263.9)
#667DA9 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) | #6E80AB | 0.014 |
| Deuteranopia (no green cones) | #677AA8 | 0.008 |
| Tritanopia (no blue cones) | #50868C | 0.065 |
| Achromatopsia (no color) | #7D7D7D | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667DA9
#667DA9
oklch(58.9% 0.073 263)
- #927949
#927949
oklch(58.9% 0.072 82.8)
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 #667DA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.025
- Dusty Blue #5A86AD ΔE 0.027
- Stormy Blue #507B9C ΔE 0.035
- Steel Blue #4682B4 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.037
- Lavender Gray #7E7F9A ΔE 0.041
- Grey Blue #647D8E ΔE 0.043
- Slate Gray #708090 ΔE 0.044
Use #667DA9 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.