#669DEE
Closest named color: Cornflower Blue (#6495ED). oklch(69.3% 0.133 257.9), rgb(102, 157, 238).
Aa
Black text reads best on this color (7.62:1).
About this color
#669DEE is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.133 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.022 away. Black text reads best on it, at 7.62:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.62:1 |
| White text | 2.75:1 |
Values
| HEX | #669DEE |
| RGB | rgb(102, 157, 238) |
| HSL | hsl(216, 80%, 67%) |
| OKLCH | oklch(69.3% 0.133 257.9) |
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 #669DEE | 2.75:1 | Fails | Lc -58.3 | Large or bold text, headings |
| Black text on #669DEE | 7.62:1 | AAA | Lc 51.0 | Large or bold text, headings |
| #669DEE text on white | 2.75:1 | Fails | Lc 53.0 | Large or bold text, headings |
| #669DEE text on black | 7.62:1 | AAA | Lc -48.8 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF8
oklch(88.6% 0.046 257.6)
-
Step 300
300
#9FC3F7
oklch(81% 0.084 257.5)
-
Step 400
400 (this color)
#669DEE
oklch(69.3% 0.133 257.9)
-
Step 500
500
#4087EE
oklch(63% 0.171 258)
-
Step 600
600
#1C6EDD
oklch(55.5% 0.186 258)
-
Step 700
700
#0D5BC0
oklch(49% 0.173 258.1)
-
Step 800
800
#104B9B
oklch(42.6% 0.143 258.1)
-
Step 900
900
#16407B
oklch(37.7% 0.111 257.8)
-
Step 950
950
#0E2648
oklch(27% 0.07 257.6)
#669DEE 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) | #7CA3F1 | 0.031 |
| Deuteranopia (no green cones) | #6A96EC | 0.018 |
| Tritanopia (no blue cones) | #00AFBA | 0.117 |
| Achromatopsia (no color) | #9C9C9C | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669DEE
#669DEE
oklch(69.3% 0.133 257.9)
- #C99025
#C99025
oklch(69.2% 0.133 77.8)
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 #669DEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.022
- Chefchaouen Blue #4895EF ΔE 0.037
- Periwinkle Blue #8F99FB ΔE 0.054
- Soft Blue #6488EA ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.056
- Perrywinkle #8F8CE7 ΔE 0.061
- Lavender Blue #8B88F8 ΔE 0.070
- Dodger Blue #1E90FF ΔE 0.071
Use #669DEE 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.