#669CFC
Closest named color: Cornflower Blue (#6495ED). oklch(69.9% 0.153 261.1), rgb(102, 156, 252).
Aa
Black text reads best on this color (7.72:1).
About this color
#669CFC is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.153 and its hue 261°. 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 7.72:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.72:1 |
| White text | 2.71:1 |
Values
| HEX | #669CFC |
| RGB | rgb(102, 156, 252) |
| HSL | hsl(218, 96%, 69%) |
| OKLCH | oklch(69.9% 0.153 261.1) |
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 #669CFC | 2.71:1 | Fails | Lc -57.6 | Large or bold text, headings |
| Black text on #669CFC | 7.72:1 | AAA | Lc 51.6 | Large or bold text, headings |
| #669CFC text on white | 2.71:1 | Fails | Lc 52.4 | Large or bold text, headings |
| #669CFC text on black | 7.72:1 | AAA | Lc -49.4 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFD
oklch(93.7% 0.027 260.3)
-
Step 200
200
#C6DAFD
oklch(88.5% 0.053 261.7)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400 (this color)
#669CFC
oklch(69.9% 0.153 261.1)
-
Step 500
500
#3F83FD
oklch(63.1% 0.195 261)
-
Step 600
600
#1E68ED
oklch(55.6% 0.213 261.2)
-
Step 700
700
#1056CE
oklch(49.2% 0.197 261)
-
Step 800
800
#1147A6
oklch(42.7% 0.163 261)
-
Step 900
900
#163D84
oklch(37.8% 0.128 261.2)
-
Step 950
950
#0E244D
oklch(26.9% 0.081 261.5)
#669CFC 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) | #73A4FF | 0.027 |
| Deuteranopia (no green cones) | #5E96FA | 0.019 |
| Tritanopia (no blue cones) | #00B2C0 | 0.132 |
| Achromatopsia (no color) | #9D9D9D | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669CFC
#669CFC
oklch(69.9% 0.153 261.1)
- #CB9300
#CB9300
oklch(69.9% 0.144 81.3)
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 #669CFC, 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 0.040
- Periwinkle Blue #8F99FB ΔE 0.047
- Soft Blue #6488EA ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.061
- Lavender Blue #8B88F8 ΔE 0.062
- Perrywinkle #8F8CE7 ΔE 0.062
- Dodger Blue #1E90FF ΔE 0.064
Use #669CFC 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.