#669CDC
Closest named color: Cornflower Blue (#6495ED). oklch(68.2% 0.111 253.5), rgb(102, 156, 220).
Aa
Black text reads best on this color (7.35:1).
About this color
#669CDC is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.111 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.035 away. Black text reads best on it, at 7.35:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.35:1 |
| White text | 2.85:1 |
Values
| HEX | #669CDC |
| RGB | rgb(102, 156, 220) |
| HSL | hsl(213, 63%, 63%) |
| OKLCH | oklch(68.2% 0.111 253.5) |
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 #669CDC | 2.85:1 | Fails | Lc -59.8 | Large or bold text, headings |
| Black text on #669CDC | 7.35:1 | AAA | Lc 49.5 | Large or bold text, headings |
| #669CDC text on white | 2.85:1 | Fails | Lc 54.6 | Large or bold text, headings |
| #669CDC text on black | 7.35:1 | AAA | Lc -47.3 | 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
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A2C4ED
oklch(81% 0.069 253.4)
-
Step 400
400 (this color)
#669CDC
oklch(68.2% 0.111 253.5)
-
Step 500
500
#448CDD
oklch(63.2% 0.142 253.3)
-
Step 600
600
#2174CA
oklch(55.6% 0.154 253.3)
-
Step 700
700
#1261AF
oklch(49.2% 0.143 253.3)
-
Step 800
800
#134F8E
oklch(42.6% 0.12 253.6)
-
Step 900
900
#184271
oklch(37.6% 0.093 253.6)
-
Step 950
950
#102742
oklch(27% 0.058 253.9)
#669CDC 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) | #829FDF | 0.034 |
| Deuteranopia (no green cones) | #7394DB | 0.024 |
| Tritanopia (no blue cones) | #1FABB2 | 0.099 |
| Achromatopsia (no color) | #999999 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669CDC
#669CDC
oklch(68.2% 0.111 253.5)
- #C28D43
#C28D43
oklch(68.1% 0.111 73)
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 #669CDC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.035
- Chefchaouen Blue #4895EF ΔE 0.047
- Dark Sky Blue #448EE4 ΔE 0.056
- Faded Blue #658CBB ΔE 0.059
- Soft Blue #6488EA ΔE 0.062
- Greyblue #77A1B5 ΔE 0.066
- Perrywinkle #8F8CE7 ΔE 0.067
- Periwinkle Blue #8F99FB ΔE 0.070
Use #669CDC 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.