#669FCE
Closest named color: Greyblue (#77A1B5). oklch(68.2% 0.092 244.6), rgb(102, 159, 206).
Aa
Black text reads best on this color (7.41:1).
About this color
#669FCE is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.092 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.043 away. Black text reads best on it, at 7.41:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.41:1 |
| White text | 2.83:1 |
Values
| HEX | #669FCE |
| RGB | rgb(102, 159, 206) |
| HSL | hsl(207, 51%, 60%) |
| OKLCH | oklch(68.2% 0.092 244.6) |
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 #669FCE | 2.83:1 | Fails | Lc -59.5 | Large or bold text, headings |
| Black text on #669FCE | 7.41:1 | AAA | Lc 49.8 | Large or bold text, headings |
| #669FCE text on white | 2.83:1 | Fails | Lc 54.2 | Large or bold text, headings |
| #669FCE text on black | 7.41:1 | AAA | Lc -47.6 | 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
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A2C5E4
oklch(80.8% 0.058 245.3)
-
Step 400
400 (this color)
#669FCE
oklch(68.2% 0.092 244.6)
-
Step 500
500
#4390CB
oklch(63.1% 0.117 244.4)
-
Step 600
600
#1C79B8
oklch(55.6% 0.128 244.5)
-
Step 700
700
#0A669F
oklch(49.2% 0.119 244.4)
-
Step 800
800
#105381
oklch(42.7% 0.099 244.9)
-
Step 900
900
#174567
oklch(37.7% 0.076 244.4)
-
Step 950
950
#0F293C
oklch(27.1% 0.048 243)
#669FCE 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) | #8B9FD0 | 0.043 |
| Deuteranopia (no green cones) | #7D95CD | 0.035 |
| Tritanopia (no blue cones) | #30AAAF | 0.076 |
| Achromatopsia (no color) | #999999 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669FCE
#669FCE
oklch(68.2% 0.092 244.6)
- #C18D5A
#C18D5A
oklch(68.3% 0.092 64.7)
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 #669FCE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.043
- Faded Blue #658CBB ΔE 0.054
- Bluegrey #85A3B2 ΔE 0.057
- Bluey Grey #89A0B0 ΔE 0.059
- Cornflower Blue #6495ED ΔE 0.060
- Cool Gray #8D99AE ΔE 0.060
- Silver Lake Blue #778DA9 ΔE 0.064
- Chefchaouen Blue #4895EF ΔE 0.068
Use #669FCE 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.