#669FF0
Closest named color: Cornflower Blue (#6495ED). oklch(69.8% 0.134 257.3), rgb(102, 159, 240).
Aa
Black text reads best on this color (7.78:1).
About this color
#669FF0 is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.134 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.027 away. Black text reads best on it, at 7.78:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.78:1 |
| White text | 2.69:1 |
Values
| HEX | #669FF0 |
| RGB | rgb(102, 159, 240) |
| HSL | hsl(215, 82%, 67%) |
| OKLCH | oklch(69.8% 0.134 257.3) |
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 #669FF0 | 2.69:1 | Fails | Lc -57.4 | Large or bold text, headings |
| Black text on #669FF0 | 7.78:1 | AAA | Lc 51.9 | Large or bold text, headings |
| #669FF0 text on white | 2.69:1 | Fails | Lc 52.2 | Large or bold text, headings |
| #669FF0 text on black | 7.78:1 | AAA | Lc -49.7 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF8
oklch(88.5% 0.046 256.5)
-
Step 300
300
#9EC3F7
oklch(80.9% 0.084 256.9)
-
Step 400
400 (this color)
#669FF0
oklch(69.8% 0.134 257.3)
-
Step 500
500
#3D88EF
oklch(63.2% 0.172 257.2)
-
Step 600
600
#166FDD
oklch(55.6% 0.186 257.2)
-
Step 700
700
#055CC0
oklch(49.1% 0.173 257.3)
-
Step 800
800
#0C4C9B
oklch(42.8% 0.143 257.1)
-
Step 900
900
#14407B
oklch(37.7% 0.111 257.2)
-
Step 950
950
#0D2648
oklch(27% 0.07 257)
#669FF0 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) | #7DA5F3 | 0.032 |
| Deuteranopia (no green cones) | #6C97EE | 0.021 |
| Tritanopia (no blue cones) | #00B1BC | 0.117 |
| Achromatopsia (no color) | #9D9D9D | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669FF0
#669FF0
oklch(69.8% 0.134 257.3)
- #CC9227
#CC9227
oklch(70% 0.134 77.5)
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 #669FF0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.027
- Chefchaouen Blue #4895EF ΔE 0.041
- Periwinkle Blue #8F99FB ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.060
- Soft Blue #6488EA ΔE 0.061
- Perrywinkle #8F8CE7 ΔE 0.064
- Lavender Blue #8B88F8 ΔE 0.072
- Dodger Blue #1E90FF ΔE 0.074
Use #669FF0 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.