#669ED9
Closest named color: Cornflower Blue (#6495ED). oklch(68.5% 0.106 250.8), rgb(102, 158, 217).
Aa
Black text reads best on this color (7.45:1).
About this color
#669ED9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.106 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.043 away. Black text reads best on it, at 7.45:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.45:1 |
| White text | 2.81:1 |
Values
| HEX | #669ED9 |
| RGB | rgb(102, 158, 217) |
| HSL | hsl(211, 60%, 63%) |
| OKLCH | oklch(68.5% 0.106 250.8) |
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 #669ED9 | 2.81:1 | Fails | Lc -59.3 | Large or bold text, headings |
| Black text on #669ED9 | 7.45:1 | AAA | Lc 50.1 | Large or bold text, headings |
| #669ED9 text on white | 2.81:1 | Fails | Lc 54.0 | Large or bold text, headings |
| #669ED9 text on black | 7.45:1 | AAA | Lc -47.8 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF1
oklch(88.4% 0.037 252.1)
-
Step 300
300
#A1C4EB
oklch(80.8% 0.067 251.4)
-
Step 400
400 (this color)
#669ED9
oklch(68.5% 0.106 250.8)
-
Step 500
500
#428DD8
oklch(63.1% 0.136 250.9)
-
Step 600
600
#1C76C5
oklch(55.7% 0.146 250.5)
-
Step 700
700
#0C62AA
oklch(49% 0.136 250.9)
-
Step 800
800
#10518A
oklch(42.8% 0.113 250.5)
-
Step 900
900
#17436E
oklch(37.6% 0.088 251)
-
Step 950
950
#0F2841
oklch(27.1% 0.056 250.6)
#669ED9 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) | #86A0DC | 0.038 |
| Deuteranopia (no green cones) | #7795D8 | 0.029 |
| Tritanopia (no blue cones) | #23ACB2 | 0.093 |
| Achromatopsia (no color) | #9A9A9A | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669ED9
#669ED9
oklch(68.5% 0.106 250.8)
- #C38E4B
#C38E4B
oklch(68.5% 0.106 70.8)
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 #669ED9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.043
- Chefchaouen Blue #4895EF ΔE 0.054
- Greyblue #77A1B5 ΔE 0.059
- Faded Blue #658CBB ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.062
- Soft Blue #6488EA ΔE 0.070
- Bluegrey #85A3B2 ΔE 0.071
- Perrywinkle #8F8CE7 ΔE 0.072
Use #669ED9 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.