#669FF8
Closest named color: Cornflower Blue (#6495ED). oklch(70.3% 0.144 259), rgb(102, 159, 248).
Aa
Black text reads best on this color (7.87:1).
About this color
#669FF8 is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.144 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.029 away. Black text reads best on it, at 7.87:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.87:1 |
| White text | 2.66:1 |
Values
| HEX | #669FF8 |
| RGB | rgb(102, 159, 248) |
| HSL | hsl(217, 91%, 69%) |
| OKLCH | oklch(70.3% 0.144 259) |
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 #669FF8 | 2.66:1 | Fails | Lc -56.8 | Large or bold text, headings |
| Black text on #669FF8 | 7.87:1 | AAA | Lc 52.4 | Large or bold text, headings |
| #669FF8 text on white | 2.66:1 | Fails | Lc 51.6 | Large or bold text, headings |
| #669FF8 text on black | 7.87:1 | AAA | Lc -50.3 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFB
oklch(88.6% 0.05 258.7)
-
Step 300
300
#9EC2FB
oklch(80.9% 0.09 259.4)
-
Step 400
400 (this color)
#669FF8
oklch(70.3% 0.144 259)
-
Step 500
500
#3C85F7
oklch(63% 0.186 259.2)
-
Step 600
600
#166CE6
oklch(55.7% 0.201 259)
-
Step 700
700
#0559C8
oklch(49.2% 0.187 259)
-
Step 800
800
#0B49A1
oklch(42.6% 0.155 259.1)
-
Step 900
900
#133F80
oklch(37.8% 0.12 258.7)
-
Step 950
950
#0D254B
oklch(27% 0.077 259.3)
#669FF8 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) | #79A6FC | 0.029 |
| Deuteranopia (no green cones) | #6698F6 | 0.018 |
| Tritanopia (no blue cones) | #00B3C0 | 0.124 |
| Achromatopsia (no color) | #9E9E9E | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669FF8
#669FF8
oklch(70.3% 0.144 259)
- #CF9309
#CF9309
oklch(70.4% 0.145 79.1)
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 #669FF8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.029
- Chefchaouen Blue #4895EF ΔE 0.042
- Periwinkle Blue #8F99FB ΔE 0.049
- Soft Blue #6488EA ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.064
- Perrywinkle #8F8CE7 ΔE 0.064
- Lavender Blue #8B88F8 ΔE 0.068
- Dodger Blue #1E90FF ΔE 0.070
Use #669FF8 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.