#669CCC
Closest named color: Greyblue (#77A1B5). oklch(67.4% 0.092 246.5), rgb(102, 156, 204).
Aa
Black text reads best on this color (7.19:1).
About this color
#669CCC is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.092 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.045 away. Black text reads best on it, at 7.19:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.19:1 |
| White text | 2.91:1 |
Values
| HEX | #669CCC |
| RGB | rgb(102, 156, 204) |
| HSL | hsl(208, 50%, 60%) |
| OKLCH | oklch(67.4% 0.092 246.5) |
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 #669CCC | 2.91:1 | Fails | Lc -60.8 | Content text, not long reading |
| Black text on #669CCC | 7.19:1 | AAA | Lc 48.6 | Large or bold text, headings |
| #669CCC text on white | 2.91:1 | Fails | Lc 55.5 | Large or bold text, headings |
| #669CCC text on black | 7.19:1 | AAA | Lc -46.3 | Large or bold text, headings |
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 400.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A3C5E4
oklch(80.9% 0.057 246.1)
-
Step 400
400 (this color)
#669CCC
oklch(67.4% 0.092 246.5)
-
Step 500
500
#478FCC
oklch(63.1% 0.117 246.6)
-
Step 600
600
#2478B9
oklch(55.6% 0.128 246.7)
-
Step 700
700
#14659F
oklch(49.1% 0.118 246.2)
-
Step 800
800
#155281
oklch(42.6% 0.098 246.8)
-
Step 900
900
#1A4568
oklch(37.8% 0.076 246.4)
-
Step 950
950
#10283D
oklch(26.9% 0.05 247.3)
#669CCC 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) | #889DCE | 0.041 |
| Deuteranopia (no green cones) | #7B92CB | 0.034 |
| Tritanopia (no blue cones) | #33A7AC | 0.077 |
| Achromatopsia (no color) | #979797 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669CCC
#669CCC
oklch(67.4% 0.092 246.5)
- #BD8B57
#BD8B57
oklch(67.4% 0.092 66.3)
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 #669CCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.045
- Faded Blue #658CBB ΔE 0.046
- Silver Lake Blue #778DA9 ΔE 0.058
- Cornflower Blue #6495ED ΔE 0.058
- Bluegrey #85A3B2 ΔE 0.060
- Cool Gray #8D99AE ΔE 0.060
- Bluey Grey #89A0B0 ΔE 0.060
- Blue Grey #758DA3 ΔE 0.064
Use #669CCC 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.