#669FDD
Closest named color: Cornflower Blue (#6495ED). oklch(68.9% 0.11 251.6), rgb(102, 159, 221).
Aa
Black text reads best on this color (7.56:1).
About this color
#669FDD is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.110 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.041 away. Black text reads best on it, at 7.56:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.56:1 |
| White text | 2.77:1 |
Values
| HEX | #669FDD |
| RGB | rgb(102, 159, 221) |
| HSL | hsl(211, 64%, 63%) |
| OKLCH | oklch(68.9% 0.11 251.6) |
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 #669FDD | 2.77:1 | Fails | Lc -58.6 | Large or bold text, headings |
| Black text on #669FDD | 7.56:1 | AAA | Lc 50.7 | Large or bold text, headings |
| #669FDD text on white | 2.77:1 | Fails | Lc 53.4 | Large or bold text, headings |
| #669FDD text on black | 7.56:1 | 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
#C7DBF2
oklch(88.4% 0.038 251.9)
-
Step 300
300
#A1C4EC
oklch(80.9% 0.068 252)
-
Step 400
400 (this color)
#669FDD
oklch(68.9% 0.11 251.6)
-
Step 500
500
#408DDB
oklch(63.2% 0.14 251.3)
-
Step 600
600
#1975C9
oklch(55.6% 0.153 251.6)
-
Step 700
700
#0762AE
oklch(49.2% 0.142 251.6)
-
Step 800
800
#0E508C
oklch(42.6% 0.117 251.5)
-
Step 900
900
#164370
oklch(37.7% 0.091 251.6)
-
Step 950
950
#0E2842
oklch(27.1% 0.058 250.8)
#669FDD 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) | #86A2E0 | 0.039 |
| Deuteranopia (no green cones) | #7696DC | 0.028 |
| Tritanopia (no blue cones) | #1BADB5 | 0.095 |
| Achromatopsia (no color) | #9B9B9B | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669FDD
#669FDD
oklch(68.9% 0.11 251.6)
- #C58F48
#C58F48
oklch(68.9% 0.11 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 #669FDD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.041
- Chefchaouen Blue #4895EF ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.062
- Greyblue #77A1B5 ΔE 0.064
- Faded Blue #658CBB ΔE 0.064
- Soft Blue #6488EA ΔE 0.069
- Periwinkle Blue #8F99FB ΔE 0.071
- Perrywinkle #8F8CE7 ΔE 0.071
Use #669FDD 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.