#669CC1
Closest named color: Greyblue (#77A1B5). oklch(66.9% 0.079 239.5), rgb(102, 156, 193).
Aa
Black text reads best on this color (7.09:1).
About this color
#669CC1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.079 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.032 away. Black text reads best on it, at 7.09:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.09:1 |
| White text | 2.96:1 |
Values
| HEX | #669CC1 |
| RGB | rgb(102, 156, 193) |
| HSL | hsl(204, 42%, 58%) |
| OKLCH | oklch(66.9% 0.079 239.5) |
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 #669CC1 | 2.96:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #669CC1 | 7.09:1 | AAA | Lc 48.0 | Large or bold text, headings |
| #669CC1 text on white | 2.96:1 | Fails | Lc 56.1 | Large or bold text, headings |
| #669CC1 text on black | 7.09:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#C9DCEA
oklch(88.5% 0.028 239.7)
-
Step 300
300
#A4C6DE
oklch(81% 0.05 239)
-
Step 400
400 (this color)
#669CC1
oklch(66.9% 0.079 239.5)
-
Step 500
500
#4991C0
oklch(63% 0.101 239.7)
-
Step 600
600
#267BAD
oklch(55.7% 0.11 239.6)
-
Step 700
700
#166794
oklch(49% 0.103 239.5)
-
Step 800
800
#175478
oklch(42.6% 0.085 239.7)
-
Step 900
900
#1B4661
oklch(37.7% 0.066 239.5)
-
Step 950
950
#112939
oklch(27% 0.042 240.1)
#669CC1 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) | #8C9BC3 | 0.046 |
| Deuteranopia (no green cones) | #7F92C0 | 0.037 |
| Tritanopia (no blue cones) | #3DA5A8 | 0.063 |
| Achromatopsia (no color) | #969696 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669CC1
#669CC1
oklch(66.9% 0.079 239.5)
- #BA8963
#BA8963
oklch(66.9% 0.08 58.7)
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 #669CC1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.032
- Faded Blue #658CBB ΔE 0.044
- Silver Lake Blue #778DA9 ΔE 0.048
- Bluegrey #85A3B2 ΔE 0.050
- Bluey Grey #89A0B0 ΔE 0.050
- Cool Gray #8D99AE ΔE 0.051
- Blue Grey #758DA3 ΔE 0.052
- Cadet Blue #5F9EA0 ΔE 0.054
Use #669CC1 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.