#669DF0
Closest named color: Cornflower Blue (#6495ED). oklch(69.4% 0.136 258.4), rgb(102, 157, 240).
Aa
Black text reads best on this color (7.64:1).
About this color
#669DF0 is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.136 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.021 away. Black text reads best on it, at 7.64:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.64:1 |
| White text | 2.74:1 |
Values
| HEX | #669DF0 |
| RGB | rgb(102, 157, 240) |
| HSL | hsl(216, 82%, 67%) |
| OKLCH | oklch(69.4% 0.136 258.4) |
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 #669DF0 | 2.74:1 | Fails | Lc -58.1 | Large or bold text, headings |
| Black text on #669DF0 | 7.64:1 | AAA | Lc 51.1 | Large or bold text, headings |
| #669DF0 text on white | 2.74:1 | Fails | Lc 52.9 | Large or bold text, headings |
| #669DF0 text on black | 7.64:1 | AAA | Lc -49.0 | 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
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBF9
oklch(88.5% 0.047 257.3)
-
Step 300
300
#9FC3F8
oklch(81% 0.085 257.9)
-
Step 400
400 (this color)
#669DF0
oklch(69.4% 0.136 258.4)
-
Step 500
500
#4087F0
oklch(63.1% 0.173 258.3)
-
Step 600
600
#1C6EDF
oklch(55.7% 0.189 258.3)
-
Step 700
700
#0D5BC2
oklch(49.2% 0.176 258.4)
-
Step 800
800
#104B9D
oklch(42.8% 0.146 258.4)
-
Step 900
900
#163F7C
oklch(37.6% 0.113 258.6)
-
Step 950
950
#0E2649
oklch(27.1% 0.072 258)
#669DF0 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) | #7BA3F3 | 0.030 |
| Deuteranopia (no green cones) | #6996EE | 0.018 |
| Tritanopia (no blue cones) | #00B0BB | 0.120 |
| Achromatopsia (no color) | #9C9C9C | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669DF0
#669DF0
oklch(69.4% 0.136 258.4)
- #CA911F
#CA911F
oklch(69.5% 0.136 78.7)
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 #669DF0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.021
- Chefchaouen Blue #4895EF ΔE 0.037
- Periwinkle Blue #8F99FB ΔE 0.052
- Soft Blue #6488EA ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.056
- Perrywinkle #8F8CE7 ΔE 0.061
- Lavender Blue #8B88F8 ΔE 0.068
- Dodger Blue #1E90FF ΔE 0.070
Use #669DF0 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.