#669DE4
Closest named color: Cornflower Blue (#6495ED). oklch(68.8% 0.121 255.3), rgb(102, 157, 228).
Aa
Black text reads best on this color (7.50:1).
About this color
#669DE4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.121 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.028 away. Black text reads best on it, at 7.50:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.50:1 |
| White text | 2.79:1 |
Values
| HEX | #669DE4 |
| RGB | rgb(102, 157, 228) |
| HSL | hsl(214, 70%, 65%) |
| OKLCH | oklch(68.8% 0.121 255.3) |
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 #669DE4 | 2.79:1 | Fails | Lc -58.9 | Large or bold text, headings |
| Black text on #669DE4 | 7.50:1 | AAA | Lc 50.4 | Large or bold text, headings |
| #669DE4 text on white | 2.79:1 | Fails | Lc 53.7 | Large or bold text, headings |
| #669DE4 text on black | 7.50:1 | AAA | Lc -48.2 | 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
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF5
oklch(88.5% 0.042 255)
-
Step 300
300
#A0C3F1
oklch(80.8% 0.076 255.4)
-
Step 400
400 (this color)
#669DE4
oklch(68.8% 0.121 255.3)
-
Step 500
500
#428AE4
oklch(63.1% 0.154 255.4)
-
Step 600
600
#1D72D2
oklch(55.6% 0.167 255.2)
-
Step 700
700
#0E5FB6
oklch(49.2% 0.155 255.3)
-
Step 800
800
#114E93
oklch(42.7% 0.128 255.2)
-
Step 900
900
#174175
oklch(37.6% 0.1 255.6)
-
Step 950
950
#0F2745
oklch(27.1% 0.064 255.3)
#669DE4 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) | #80A1E7 | 0.033 |
| Deuteranopia (no green cones) | #7095E3 | 0.022 |
| Tritanopia (no blue cones) | #07ADB6 | 0.107 |
| Achromatopsia (no color) | #9A9A9A | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669DE4
#669DE4
oklch(68.8% 0.121 255.3)
- #C68F39
#C68F39
oklch(68.8% 0.121 75.1)
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 #669DE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.028
- Chefchaouen Blue #4895EF ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.055
- Soft Blue #6488EA ΔE 0.059
- Periwinkle Blue #8F99FB ΔE 0.062
- Perrywinkle #8F8CE7 ΔE 0.064
- Faded Blue #658CBB ΔE 0.069
- Greyblue #77A1B5 ΔE 0.076
Use #669DE4 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.