#669FD9
Closest named color: Cornflower Blue (#6495ED). oklch(68.7% 0.105 250), rgb(102, 159, 217).
Aa
Black text reads best on this color (7.52:1).
About this color
#669FD9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.105 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.045 away. Black text reads best on it, at 7.52:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.52:1 |
| White text | 2.79:1 |
Values
| HEX | #669FD9 |
| RGB | rgb(102, 159, 217) |
| HSL | hsl(210, 60%, 63%) |
| OKLCH | oklch(68.7% 0.105 250) |
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 #669FD9 | 2.79:1 | Fails | Lc -58.9 | Large or bold text, headings |
| Black text on #669FD9 | 7.52:1 | AAA | Lc 50.4 | Large or bold text, headings |
| #669FD9 text on white | 2.79:1 | Fails | Lc 53.6 | Large or bold text, headings |
| #669FD9 text on black | 7.52:1 | AAA | Lc -48.2 | 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
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCF1
oklch(88.6% 0.036 249.5)
-
Step 300
300
#A1C5EA
oklch(81% 0.065 249.3)
-
Step 400
400 (this color)
#669FD9
oklch(68.7% 0.105 250)
-
Step 500
500
#418ED7
oklch(63.2% 0.134 249.7)
-
Step 600
600
#1A76C4
oklch(55.6% 0.146 250)
-
Step 700
700
#0763AA
oklch(49.2% 0.136 250)
-
Step 800
800
#0E5189
oklch(42.7% 0.112 249.8)
-
Step 900
900
#16446E
oklch(37.8% 0.087 249.7)
-
Step 950
950
#0F2840
oklch(27% 0.055 249.7)
#669FD9 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) | #87A1DC | 0.039 |
| Deuteranopia (no green cones) | #7896D8 | 0.029 |
| Tritanopia (no blue cones) | #22ACB3 | 0.090 |
| Achromatopsia (no color) | #9B9B9B | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669FD9
#669FD9
oklch(68.7% 0.105 250)
- #C48E4D
#C48E4D
oklch(68.6% 0.105 69.6)
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 #669FD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.045
- Chefchaouen Blue #4895EF ΔE 0.055
- Greyblue #77A1B5 ΔE 0.058
- Faded Blue #658CBB ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.065
- Bluegrey #85A3B2 ΔE 0.070
- Bluey Grey #89A0B0 ΔE 0.071
- Cool Gray #8D99AE ΔE 0.072
Use #669FD9 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.