#669ECC
Closest named color: Greyblue (#77A1B5). oklch(67.9% 0.09 244.5), rgb(102, 158, 204).
Aa
Black text reads best on this color (7.32:1).
About this color
#669ECC is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.090 and its hue 244°. 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 7.32:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.32:1 |
| White text | 2.86:1 |
Values
| HEX | #669ECC |
| RGB | rgb(102, 158, 204) |
| HSL | hsl(207, 50%, 60%) |
| OKLCH | oklch(67.9% 0.09 244.5) |
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 #669ECC | 2.86:1 | Fails | Lc -60.0 | Content text, not long reading |
| Black text on #669ECC | 7.32:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #669ECC text on white | 2.86:1 | Fails | Lc 54.7 | Large or bold text, headings |
| #669ECC text on black | 7.32:1 | AAA | Lc -47.1 | 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
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A3C5E3
oklch(80.9% 0.056 245.2)
-
Step 400
400 (this color)
#669ECC
oklch(67.9% 0.09 244.5)
-
Step 500
500
#4490CA
oklch(63.1% 0.115 244.2)
-
Step 600
600
#1F79B7
oklch(55.6% 0.126 244.5)
-
Step 700
700
#0E669E
oklch(49.2% 0.117 244.4)
-
Step 800
800
#125380
oklch(42.7% 0.097 244.7)
-
Step 900
900
#184567
oklch(37.7% 0.076 244.8)
-
Step 950
950
#10293C
oklch(27.1% 0.047 243.8)
#669ECC 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) | #8B9ECE | 0.044 |
| Deuteranopia (no green cones) | #7D94CB | 0.035 |
| Tritanopia (no blue cones) | #33A9AD | 0.076 |
| Achromatopsia (no color) | #999999 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669ECC
#669ECC
oklch(67.9% 0.09 244.5)
- #BF8C5B
#BF8C5B
oklch(67.9% 0.09 64.2)
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 #669ECC, 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 0.051
- Bluegrey #85A3B2 ΔE 0.056
- Bluey Grey #89A0B0 ΔE 0.058
- Cool Gray #8D99AE ΔE 0.059
- Silver Lake Blue #778DA9 ΔE 0.060
- Cornflower Blue #6495ED ΔE 0.061
- Blue Grey #758DA3 ΔE 0.066
Use #669ECC 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.