#669CBC
Closest named color: Greyblue (#77A1B5). oklch(66.7% 0.074 235.5), rgb(102, 156, 188).
Aa
Black text reads best on this color (7.04:1).
About this color
#669CBC is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.074 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.028 away. Black text reads best on it, at 7.04:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.04:1 |
| White text | 2.98:1 |
Values
| HEX | #669CBC |
| RGB | rgb(102, 156, 188) |
| HSL | hsl(202, 39%, 57%) |
| OKLCH | oklch(66.7% 0.074 235.5) |
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 #669CBC | 2.98:1 | Fails | Lc -61.7 | Content text, not long reading |
| Black text on #669CBC | 7.04:1 | AAA | Lc 47.7 | Large or bold text, headings |
| #669CBC text on white | 2.98:1 | Fails | Lc 56.3 | Large or bold text, headings |
| #669CBC text on black | 7.04:1 | AAA | Lc -45.5 | 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 500.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE5
oklch(88.6% 0.02 233.9)
-
Step 300
300
#ABC5D5
oklch(80.9% 0.036 234.9)
-
Step 400
400
#7DA7C0
oklch(70.7% 0.058 234.8)
-
Step 500
500 (this color)
#669CBC
oklch(66.7% 0.074 235.5)
-
Step 600
600
#3F7B9C
oklch(55.7% 0.081 234.8)
-
Step 700
700
#316785
oklch(49% 0.075 235.4)
-
Step 800
800
#29546C
oklch(42.6% 0.062 235.3)
-
Step 900
900
#264658
oklch(37.8% 0.049 234.7)
-
Step 950
950
#172933
oklch(27% 0.03 233.8)
#669CBC 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) | #8D9BBE | 0.047 |
| Deuteranopia (no green cones) | #8191BC | 0.042 |
| Tritanopia (no blue cones) | #40A4A6 | 0.057 |
| Achromatopsia (no color) | #959595 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669CBC
#669CBC
oklch(66.7% 0.074 235.5)
- #B88968
#B88968
oklch(66.8% 0.074 56.2)
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 #669CBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.028
- Silver Lake Blue #778DA9 ΔE 0.045
- Faded Blue #658CBB ΔE 0.046
- Cadet Blue #5F9EA0 ΔE 0.046
- Bluegrey #85A3B2 ΔE 0.046
- Bluey Grey #89A0B0 ΔE 0.047
- Blue Grey #758DA3 ΔE 0.048
- Cool Gray #8D99AE ΔE 0.048
Use #669CBC 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.