#669CD9
Closest named color: Cornflower Blue (#6495ED). oklch(68% 0.107 252.4), rgb(102, 156, 217).
Aa
Black text reads best on this color (7.32:1).
About this color
#669CD9 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 0.039 away. Black text reads best on it, at 7.32:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.32:1 |
| White text | 2.86:1 |
Values
| HEX | #669CD9 |
| RGB | rgb(102, 156, 217) |
| HSL | hsl(212, 60%, 63%) |
| OKLCH | oklch(68% 0.107 252.4) |
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 #669CD9 | 2.86:1 | Fails | Lc -60.0 | Content text, not long reading |
| Black text on #669CD9 | 7.32:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #669CD9 text on white | 2.86:1 | Fails | Lc 54.7 | Large or bold text, headings |
| #669CD9 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF2
oklch(88.4% 0.038 253.2)
-
Step 300
300
#A2C4EC
oklch(80.9% 0.068 252.7)
-
Step 400
400 (this color)
#669CD9
oklch(68% 0.107 252.4)
-
Step 500
500
#458CDA
oklch(63.1% 0.138 252.7)
-
Step 600
600
#2175C7
oklch(55.7% 0.149 252.2)
-
Step 700
700
#1261AC
oklch(49% 0.139 252.6)
-
Step 800
800
#14508B
oklch(42.7% 0.114 252.3)
-
Step 900
900
#19436F
oklch(37.7% 0.089 252.2)
-
Step 950
950
#102741
oklch(26.9% 0.057 253.1)
#669CD9 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) | #839FDC | 0.036 |
| Deuteranopia (no green cones) | #7593D8 | 0.027 |
| Tritanopia (no blue cones) | #24AAB1 | 0.094 |
| Achromatopsia (no color) | #989898 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669CD9
#669CD9
oklch(68% 0.107 252.4)
- #C18D47
#C18D47
oklch(68% 0.108 72.4)
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 #669CD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.039
- Chefchaouen Blue #4895EF ΔE 0.050
- Faded Blue #658CBB ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.058
- Greyblue #77A1B5 ΔE 0.062
- Soft Blue #6488EA ΔE 0.065
- Perrywinkle #8F8CE7 ΔE 0.069
- Silver Lake Blue #778DA9 ΔE 0.073
Use #669CD9 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.