#667FAC
Closest named color: Off Blue (#5684AE). oklch(59.5% 0.075 261.9), rgb(102, 127, 172).
Aa
Black text reads best on this color (5.19:1).
About this color
#667FAC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.075 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.021 away. Black text reads best on it, at 5.19:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.19:1 |
| White text | 4.04:1 |
Values
| HEX | #667FAC |
| RGB | rgb(102, 127, 172) |
| HSL | hsl(219, 30%, 54%) |
| OKLCH | oklch(59.5% 0.075 261.9) |
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 #667FAC | 4.04:1 | AA large text | Lc -73.1 | Content text, not long reading |
| Black text on #667FAC | 5.19:1 | AA | Lc 36.5 | Non-text elements, placeholder text |
| #667FAC text on white | 4.04:1 | AA large text | Lc 67.6 | Content text, not long reading |
| #667FAC text on black | 5.19:1 | AA | Lc -34.0 | 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 500.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2DAE7
oklch(88.6% 0.02 260.2)
-
Step 300
300
#B4C1D9
oklch(80.9% 0.037 262.8)
-
Step 400
400
#8DA1C6
oklch(70.7% 0.059 262.6)
-
Step 500
500 (this color)
#667FAC
oklch(59.5% 0.075 261.9)
-
Step 600
600
#5973A3
oklch(55.5% 0.081 262.2)
-
Step 700
700
#49618C
oklch(49.2% 0.075 261.6)
-
Step 800
800
#3C4F72
oklch(42.8% 0.063 262.1)
-
Step 900
900
#33425C
oklch(37.8% 0.049 261.1)
-
Step 950
950
#1E2736
oklch(27.1% 0.031 260.5)
#667FAC 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) | #6F82AE | 0.015 |
| Deuteranopia (no green cones) | #687BAB | 0.011 |
| Tritanopia (no blue cones) | #4E888F | 0.066 |
| Achromatopsia (no color) | #7E7E7E | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #667FAC
#667FAC
oklch(59.5% 0.075 261.9)
- #957A49
#957A49
oklch(59.4% 0.074 81.4)
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 #667FAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.021
- Dusty Blue #5A86AD ΔE 0.023
- Cool Blue #4984B8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.035
- Faded Blue #658CBB ΔE 0.038
- Stormy Blue #507B9C ΔE 0.039
- Lavender Gray #7E7F9A ΔE 0.041
- Slate Gray #708090 ΔE 0.046
Use #667FAC 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.