#669FDE
Closest named color: Cornflower Blue (#6495ED). oklch(68.9% 0.111 251.9), rgb(102, 159, 222).
Aa
Black text reads best on this color (7.57:1).
About this color
#669FDE is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.111 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.039 away. Black text reads best on it, at 7.57:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.57:1 |
| White text | 2.77:1 |
Values
| HEX | #669FDE |
| RGB | rgb(102, 159, 222) |
| HSL | hsl(212, 65%, 64%) |
| OKLCH | oklch(68.9% 0.111 251.9) |
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 #669FDE | 2.77:1 | Fails | Lc -58.6 | Large or bold text, headings |
| Black text on #669FDE | 7.57:1 | AAA | Lc 50.7 | Large or bold text, headings |
| #669FDE text on white | 2.77:1 | Fails | Lc 53.3 | Large or bold text, headings |
| #669FDE text on black | 7.57:1 | AAA | Lc -48.5 | 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
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C7DBF3
oklch(88.4% 0.04 253)
-
Step 300
300
#A0C4ED
oklch(80.8% 0.07 252)
-
Step 400
400 (this color)
#669FDE
oklch(68.9% 0.111 251.9)
-
Step 500
500
#408CDC
oklch(63% 0.142 252.1)
-
Step 600
600
#1975CA
oklch(55.7% 0.154 251.9)
-
Step 700
700
#0661AE
oklch(49% 0.144 252)
-
Step 800
800
#0D508D
oklch(42.7% 0.119 251.7)
-
Step 900
900
#164371
oklch(37.8% 0.093 252.1)
-
Step 950
950
#0E2742
oklch(26.9% 0.059 252.4)
#669FDE 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) | #85A2E1 | 0.037 |
| Deuteranopia (no green cones) | #7696DD | 0.028 |
| Tritanopia (no blue cones) | #19ADB5 | 0.097 |
| Achromatopsia (no color) | #9B9B9B | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669FDE
#669FDE
oklch(68.9% 0.111 251.9)
- #C68F46
#C68F46
oklch(69% 0.112 71.7)
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 #669FDE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.039
- Chefchaouen Blue #4895EF ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.062
- Greyblue #77A1B5 ΔE 0.065
- Faded Blue #658CBB ΔE 0.065
- Soft Blue #6488EA ΔE 0.069
- Periwinkle Blue #8F99FB ΔE 0.070
- Perrywinkle #8F8CE7 ΔE 0.070
Use #669FDE 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.