#669CFF
Closest named color: Cornflower Blue (#6495ED). oklch(70% 0.157 261.6), rgb(102, 156, 255).
Aa
Black text reads best on this color (7.76:1).
About this color
#669CFF is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.157 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.030 away. Black text reads best on it, at 7.76:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.76:1 |
| White text | 2.70:1 |
Values
| HEX | #669CFF |
| RGB | rgb(102, 156, 255) |
| HSL | hsl(219, 100%, 70%) |
| OKLCH | oklch(70% 0.157 261.6) |
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 #669CFF | 2.70:1 | Fails | Lc -57.4 | Large or bold text, headings |
| Black text on #669CFF | 7.76:1 | AAA | Lc 51.8 | Large or bold text, headings |
| #669CFF text on white | 2.70:1 | Fails | Lc 52.2 | Large or bold text, headings |
| #669CFF text on black | 7.76:1 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C6DAFE
oklch(88.5% 0.054 262.2)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400 (this color)
#669CFF
oklch(70% 0.157 261.6)
-
Step 500
500
#4082FF
oklch(63.1% 0.198 261.6)
-
Step 600
600
#1E67F0
oklch(55.6% 0.218 261.6)
-
Step 700
700
#1154D1
oklch(49.1% 0.203 261.7)
-
Step 800
800
#1146A9
oklch(42.7% 0.168 261.6)
-
Step 900
900
#163C85
oklch(37.6% 0.13 261.7)
-
Step 950
950
#0E244E
oklch(27% 0.082 261.8)
#669CFF 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) | #71A5FF | 0.028 |
| Deuteranopia (no green cones) | #5C97FD | 0.018 |
| Tritanopia (no blue cones) | #00B2C1 | 0.134 |
| Achromatopsia (no color) | #9D9D9D | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669CFF
#669CFF
oklch(70% 0.157 261.6)
- #CB9400
#CB9400
oklch(70.1% 0.144 82)
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 #669CFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.030
- Chefchaouen Blue #4895EF ΔE 0.042
- Periwinkle Blue #8F99FB ΔE 0.047
- Soft Blue #6488EA ΔE 0.056
- Lavender Blue #8B88F8 ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.064
- Perrywinkle #8F8CE7 ΔE 0.064
- Dodger Blue #1E90FF ΔE 0.064
Use #669CFF 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.