#669DD9
Closest named color: Cornflower Blue (#6495ED). oklch(68.3% 0.107 251.6), rgb(102, 157, 217).
Aa
Black text reads best on this color (7.38:1).
About this color
#669DD9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.107 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.041 away. Black text reads best on it, at 7.38:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.38:1 |
| White text | 2.84:1 |
Values
| HEX | #669DD9 |
| RGB | rgb(102, 157, 217) |
| HSL | hsl(211, 60%, 63%) |
| OKLCH | oklch(68.3% 0.107 251.6) |
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 #669DD9 | 2.84:1 | Fails | Lc -59.6 | Large or bold text, headings |
| Black text on #669DD9 | 7.38:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #669DD9 text on white | 2.84:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #669DD9 text on black | 7.38:1 | AAA | Lc -47.5 | 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 400.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF1
oklch(88.4% 0.037 252.1)
-
Step 300
300
#A2C4EB
oklch(80.9% 0.066 252.1)
-
Step 400
400 (this color)
#669DD9
oklch(68.3% 0.107 251.6)
-
Step 500
500
#448DD9
oklch(63.2% 0.136 251.6)
-
Step 600
600
#1F75C6
oklch(55.6% 0.148 251.6)
-
Step 700
700
#0F62AB
oklch(49.1% 0.137 251.5)
-
Step 800
800
#12508B
oklch(42.7% 0.115 251.9)
-
Step 900
900
#18436F
oklch(37.7% 0.089 251.8)
-
Step 950
950
#0F2841
oklch(27.1% 0.056 250.6)
#669DD9 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) | #85A0DC | 0.038 |
| Deuteranopia (no green cones) | #7694D8 | 0.028 |
| Tritanopia (no blue cones) | #23ABB2 | 0.093 |
| Achromatopsia (no color) | #999999 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669DD9
#669DD9
oklch(68.3% 0.107 251.6)
- #C28E49
#C28E49
oklch(68.4% 0.107 72.1)
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 #669DD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.041
- Chefchaouen Blue #4895EF ΔE 0.052
- Faded Blue #658CBB ΔE 0.057
- Dark Sky Blue #448EE4 ΔE 0.060
- Greyblue #77A1B5 ΔE 0.060
- Soft Blue #6488EA ΔE 0.068
- Perrywinkle #8F8CE7 ΔE 0.071
- Bluegrey #85A3B2 ΔE 0.073
Use #669DD9 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.