#669BC8
Closest named color: Greyblue (#77A1B5). oklch(67% 0.088 245.2), rgb(102, 155, 200).
Aa
Black text reads best on this color (7.08:1).
About this color
#669BC8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.088 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.042 away. Black text reads best on it, at 7.08:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.08:1 |
| White text | 2.96:1 |
Values
| HEX | #669BC8 |
| RGB | rgb(102, 155, 200) |
| HSL | hsl(208, 47%, 59%) |
| OKLCH | oklch(67% 0.088 245.2) |
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 #669BC8 | 2.96:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #669BC8 | 7.08:1 | AAA | Lc 48.0 | Large or bold text, headings |
| #669BC8 text on white | 2.96:1 | Fails | Lc 56.1 | Large or bold text, headings |
| #669BC8 text on black | 7.08:1 | AAA | Lc -45.7 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#C9DCEC
oklch(88.5% 0.03 243.4)
-
Step 300
300
#A4C5E2
oklch(80.9% 0.054 245.1)
-
Step 400
400 (this color)
#669BC8
oklch(67% 0.088 245.2)
-
Step 500
500
#4990C9
oklch(63.2% 0.112 245.1)
-
Step 600
600
#2679B5
oklch(55.6% 0.121 244.8)
-
Step 700
700
#17659C
oklch(49% 0.113 245.3)
-
Step 800
800
#17537F
oklch(42.7% 0.094 245.3)
-
Step 900
900
#1B4566
oklch(37.8% 0.073 245.3)
-
Step 950
950
#11283C
oklch(26.9% 0.047 246.9)
#669BC8 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) | #889CCA | 0.041 |
| Deuteranopia (no green cones) | #7B91C7 | 0.034 |
| Tritanopia (no blue cones) | #37A6AA | 0.074 |
| Achromatopsia (no color) | #969696 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669BC8
#669BC8
oklch(67% 0.088 245.2)
- #BB8A5A
#BB8A5A
oklch(67% 0.088 64.8)
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 #669BC8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.042
- Faded Blue #658CBB ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.052
- Cool Gray #8D99AE ΔE 0.057
- Bluegrey #85A3B2 ΔE 0.058
- Bluey Grey #89A0B0 ΔE 0.058
- Blue Grey #758DA3 ΔE 0.058
- Cornflower Blue #6495ED ΔE 0.062
Use #669BC8 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.