#669AE9
Closest named color: Cornflower Blue (#6495ED). oklch(68.4% 0.13 258.5), rgb(102, 154, 233).
Aa
Black text reads best on this color (7.36:1).
About this color
#669AE9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.130 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 7.36:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.36:1 |
| White text | 2.85:1 |
Values
| HEX | #669AE9 |
| RGB | rgb(102, 154, 233) |
| HSL | hsl(216, 75%, 66%) |
| OKLCH | oklch(68.4% 0.13 258.5) |
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 #669AE9 | 2.85:1 | Fails | Lc -59.8 | Large or bold text, headings |
| Black text on #669AE9 | 7.36:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #669AE9 text on white | 2.85:1 | Fails | Lc 54.5 | Large or bold text, headings |
| #669AE9 text on black | 7.36:1 | AAA | Lc -47.4 | 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
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C7DBF8
oklch(88.6% 0.046 257.6)
-
Step 300
300
#A1C2F5
oklch(80.8% 0.081 259)
-
Step 400
400 (this color)
#669AE9
oklch(68.4% 0.13 258.5)
-
Step 500
500
#4587EC
oklch(63.1% 0.166 258.8)
-
Step 600
600
#246EDA
oklch(55.5% 0.181 258.7)
-
Step 700
700
#165CBD
oklch(49.2% 0.167 258.4)
-
Step 800
800
#154B99
oklch(42.6% 0.139 258.6)
-
Step 900
900
#19407A
oklch(37.8% 0.108 258.5)
-
Step 950
950
#102647
oklch(27% 0.068 258.4)
#669AE9 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) | #7AA0EC | 0.029 |
| Deuteranopia (no green cones) | #6993E7 | 0.018 |
| Tritanopia (no blue cones) | #00ACB7 | 0.115 |
| Achromatopsia (no color) | #999999 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669AE9
#669AE9
oklch(68.4% 0.13 258.5)
- #C58E27
#C58E27
oklch(68.4% 0.13 78)
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 #669AE9, 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 0.049
- Dark Sky Blue #448EE4 ΔE 0.049
- Periwinkle Blue #8F99FB ΔE 0.057
- Perrywinkle #8F8CE7 ΔE 0.058
- Lavender Blue #8B88F8 ΔE 0.068
- Dodger Blue #1E90FF ΔE 0.070
Use #669AE9 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.