#669BC7
Closest named color: Greyblue (#77A1B5). oklch(67% 0.087 244.6), rgb(102, 155, 199).
Aa
Black text reads best on this color (7.07:1).
About this color
#669BC7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.087 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.041 away. Black text reads best on it, at 7.07:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.07:1 |
| White text | 2.96:1 |
Values
| HEX | #669BC7 |
| RGB | rgb(102, 155, 199) |
| HSL | hsl(207, 46%, 59%) |
| OKLCH | oklch(67% 0.087 244.6) |
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 #669BC7 | 2.96:1 | Fails | Lc -61.5 | Content text, not long reading |
| Black text on #669BC7 | 7.07:1 | AAA | Lc 47.9 | Large or bold text, headings |
| #669BC7 text on white | 2.96:1 | Fails | Lc 56.1 | Large or bold text, headings |
| #669BC7 text on black | 7.07:1 | 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)
#669BC7
oklch(67% 0.087 244.6)
-
Step 500
500
#4990C8
oklch(63.2% 0.111 244.7)
-
Step 600
600
#2779B4
oklch(55.6% 0.12 244.6)
-
Step 700
700
#18669B
oklch(49.2% 0.111 244.3)
-
Step 800
800
#17537E
oklch(42.7% 0.093 244.7)
-
Step 900
900
#1B4565
oklch(37.7% 0.072 244.5)
-
Step 950
950
#11293B
oklch(27.1% 0.045 243.2)
#669BC7 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) | #899BC9 | 0.042 |
| Deuteranopia (no green cones) | #7C91C6 | 0.035 |
| Tritanopia (no blue cones) | #38A6AA | 0.073 |
| Achromatopsia (no color) | #969696 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669BC7
#669BC7
oklch(67% 0.087 244.6)
- #BA8A5B
#BA8A5B
oklch(66.9% 0.086 64.9)
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 #669BC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.041
- Faded Blue #658CBB ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.051
- Cool Gray #8D99AE ΔE 0.056
- Bluegrey #85A3B2 ΔE 0.057
- Bluey Grey #89A0B0 ΔE 0.057
- Blue Grey #758DA3 ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.064
Use #669BC7 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.