#669BEF
Closest named color: Cornflower Blue (#6495ED). oklch(68.9% 0.137 259.3), rgb(102, 155, 239).
Aa
Black text reads best on this color (7.49:1).
About this color
#669BEF is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.137 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.016 away. Black text reads best on it, at 7.49:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.49:1 |
| White text | 2.80:1 |
Values
| HEX | #669BEF |
| RGB | rgb(102, 155, 239) |
| HSL | hsl(217, 81%, 67%) |
| OKLCH | oklch(68.9% 0.137 259.3) |
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 #669BEF | 2.80:1 | Fails | Lc -59.0 | Large or bold text, headings |
| Black text on #669BEF | 7.49:1 | AAA | Lc 50.3 | Large or bold text, headings |
| #669BEF text on white | 2.80:1 | Fails | Lc 53.7 | Large or bold text, headings |
| #669BEF text on black | 7.49:1 | AAA | Lc -48.1 | 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
#C7DAF9
oklch(88.4% 0.048 260.2)
-
Step 300
300
#A0C2F8
oklch(80.9% 0.085 259.5)
-
Step 400
400 (this color)
#669BEF
oklch(68.9% 0.137 259.3)
-
Step 500
500
#4286F1
oklch(63.1% 0.175 259.2)
-
Step 600
600
#216DE0
oklch(55.7% 0.19 259.3)
-
Step 700
700
#135AC2
oklch(49.1% 0.176 259.2)
-
Step 800
800
#144A9D
oklch(42.6% 0.146 259.4)
-
Step 900
900
#183F7D
oklch(37.7% 0.114 259.5)
-
Step 950
950
#0F2549
oklch(26.9% 0.073 259.8)
#669BEF 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) | #78A1F2 | 0.027 |
| Deuteranopia (no green cones) | #6695ED | 0.016 |
| Tritanopia (no blue cones) | #00AEBA | 0.120 |
| Achromatopsia (no color) | #9A9A9A | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669BEF
#669BEF
oklch(68.9% 0.137 259.3)
- #C8901A
#C8901A
oklch(69% 0.137 79.4)
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 #669BEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.016
- Chefchaouen Blue #4895EF ΔE 0.034
- Soft Blue #6488EA ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.052
- Periwinkle Blue #8F99FB ΔE 0.053
- Perrywinkle #8F8CE7 ΔE 0.058
- Lavender Blue #8B88F8 ΔE 0.065
- Dodger Blue #1E90FF ΔE 0.067
Use #669BEF 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.