#669FE4
Closest named color: Cornflower Blue (#6495ED). oklch(69.2% 0.119 254), rgb(102, 159, 228).
Aa
Black text reads best on this color (7.64:1).
About this color
#669FE4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.119 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.033 away. Black text reads best on it, at 7.64:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.64:1 |
| White text | 2.74:1 |
Values
| HEX | #669FE4 |
| RGB | rgb(102, 159, 228) |
| HSL | hsl(213, 70%, 65%) |
| OKLCH | oklch(69.2% 0.119 254) |
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 #669FE4 | 2.74:1 | Fails | Lc -58.2 | Large or bold text, headings |
| Black text on #669FE4 | 7.64:1 | AAA | Lc 51.1 | Large or bold text, headings |
| #669FE4 text on white | 2.74:1 | Fails | Lc 52.9 | Large or bold text, headings |
| #669FE4 text on black | 7.64:1 | AAA | Lc -48.9 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF5
oklch(88.5% 0.042 255)
-
Step 300
300
#A0C4F0
oklch(81% 0.074 253.7)
-
Step 400
400 (this color)
#669FE4
oklch(69.2% 0.119 254)
-
Step 500
500
#3F8BE2
oklch(63.1% 0.151 253.8)
-
Step 600
600
#1873D0
oklch(55.6% 0.164 253.9)
-
Step 700
700
#0660B4
oklch(49.1% 0.153 253.8)
-
Step 800
800
#0D4F92
oklch(42.8% 0.126 253.8)
-
Step 900
900
#154274
oklch(37.7% 0.098 253.8)
-
Step 950
950
#0E2744
oklch(27% 0.062 253.9)
#669FE4 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) | #83A3E7 | 0.036 |
| Deuteranopia (no green cones) | #7396E3 | 0.026 |
| Tritanopia (no blue cones) | #05AFB7 | 0.106 |
| Achromatopsia (no color) | #9C9C9C | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669FE4
#669FE4
oklch(69.2% 0.119 254)
- #C8903E
#C8903E
oklch(69.3% 0.119 73.7)
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 #669FE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.060
- Periwinkle Blue #8F99FB ΔE 0.063
- Soft Blue #6488EA ΔE 0.065
- Perrywinkle #8F8CE7 ΔE 0.067
- Faded Blue #658CBB ΔE 0.071
- Greyblue #77A1B5 ΔE 0.074
Use #669FE4 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.