#669DD0
Closest named color: Greyblue (#77A1B5). oklch(67.8% 0.096 247.6), rgb(102, 157, 208).
Aa
Black text reads best on this color (7.29:1).
About this color
#669DD0 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.096 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.048 away. Black text reads best on it, at 7.29:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.29:1 |
| White text | 2.87:1 |
Values
| HEX | #669DD0 |
| RGB | rgb(102, 157, 208) |
| HSL | hsl(209, 53%, 61%) |
| OKLCH | oklch(67.8% 0.096 247.6) |
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 #669DD0 | 2.87:1 | Fails | Lc -60.2 | Content text, not long reading |
| Black text on #669DD0 | 7.29:1 | AAA | Lc 49.2 | Large or bold text, headings |
| #669DD0 text on white | 2.87:1 | Fails | Lc 54.9 | Large or bold text, headings |
| #669DD0 text on black | 7.29:1 | AAA | Lc -46.9 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEF
oklch(88.5% 0.034 246.8)
-
Step 300
300
#A2C5E6
oklch(80.9% 0.06 247)
-
Step 400
400 (this color)
#669DD0
oklch(67.8% 0.096 247.6)
-
Step 500
500
#458FCF
oklch(63.1% 0.122 247.3)
-
Step 600
600
#2178BC
oklch(55.7% 0.132 247.3)
-
Step 700
700
#1164A2
oklch(49% 0.123 247.6)
-
Step 800
800
#135284
oklch(42.7% 0.103 247.8)
-
Step 900
900
#194469
oklch(37.6% 0.079 247.8)
-
Step 950
950
#10283E
oklch(27% 0.051 248.4)
#669DD0 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) | #889ED2 | 0.040 |
| Deuteranopia (no green cones) | #7A93CF | 0.033 |
| Tritanopia (no blue cones) | #2FA9AE | 0.082 |
| Achromatopsia (no color) | #989898 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669DD0
#669DD0
oklch(67.8% 0.096 247.6)
- #BF8C54
#BF8C54
oklch(67.8% 0.096 67.6)
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 #669DD0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.048
- Faded Blue #658CBB ΔE 0.051
- Cornflower Blue #6495ED ΔE 0.054
- Chefchaouen Blue #4895EF ΔE 0.062
- Bluegrey #85A3B2 ΔE 0.062
- Silver Lake Blue #778DA9 ΔE 0.063
- Bluey Grey #89A0B0 ΔE 0.063
- Cool Gray #8D99AE ΔE 0.063
Use #669DD0 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.