#668BFE
Closest named color: Soft Blue (#6488EA). oklch(66.5% 0.175 268), rgb(102, 139, 254).
Aa
Black text reads best on this color (6.68:1).
About this color
#668BFE is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.175 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.030 away. Black text reads best on it, at 6.68:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.68:1 |
| White text | 3.13:1 |
Values
| HEX | #668BFE |
| RGB | rgb(102, 139, 254) |
| HSL | hsl(225, 99%, 70%) |
| OKLCH | oklch(66.5% 0.175 268) |
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 #668BFE | 3.13:1 | AA large text | Lc -63.6 | Content text, not long reading |
| Black text on #668BFE | 6.68:1 | AA | Lc 45.9 | Large or bold text, headings |
| #668BFE text on white | 3.13:1 | AA large text | Lc 58.2 | Large or bold text, headings |
| #668BFE text on black | 6.68:1 | AA | Lc -43.5 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9FA
oklch(88.6% 0.048 268.4)
-
Step 300
300
#A9BFF9
oklch(80.9% 0.086 268.4)
-
Step 400
400
#7C9CF6
oklch(70.7% 0.137 268)
-
Step 500
500 (this color)
#668BFE
oklch(66.5% 0.175 268)
-
Step 600
600
#4566E1
oklch(55.6% 0.191 268.2)
-
Step 700
700
#3754C3
oklch(49.1% 0.177 268.1)
-
Step 800
800
#2D469E
oklch(42.8% 0.146 267.8)
-
Step 900
900
#283C7D
oklch(37.8% 0.113 267.8)
-
Step 950
950
#172349
oklch(26.8% 0.072 268.1)
#668BFE 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) | #5499FF | 0.037 |
| Deuteranopia (no green cones) | #3C8BFC | 0.038 |
| Tritanopia (no blue cones) | #00A5B8 | 0.152 |
| Achromatopsia (no color) | #919191 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668BFE
#668BFE
oklch(66.5% 0.175 268)
- #B68E00
#B68E00
oklch(66.6% 0.136 88.5)
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 #668BFE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.030
- Cornflower Blue #6495ED ΔE 0.039
- Cornflower #6A79F7 ΔE 0.044
- Chefchaouen Blue #4895EF ΔE 0.045
- Lavender Blue #8B88F8 ΔE 0.047
- Dodger Blue #1E90FF ΔE 0.051
- Periwinkle #8E82FE ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.053
Use #668BFE 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.