#668BE4
Closest named color: Soft Blue (#6488EA). oklch(65% 0.14 265.6), rgb(102, 139, 228).
Aa
Black text reads best on this color (6.37:1).
About this color
#668BE4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.140 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.013 away. Black text reads best on it, at 6.37:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.37:1 |
| White text | 3.29:1 |
Values
| HEX | #668BE4 |
| RGB | rgb(102, 139, 228) |
| HSL | hsl(222, 70%, 65%) |
| OKLCH | oklch(65% 0.14 265.6) |
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 #668BE4 | 3.29:1 | AA large text | Lc -65.5 | Content text, not long reading |
| Black text on #668BE4 | 6.37:1 | AA | Lc 44.0 | Non-text elements, placeholder text |
| #668BE4 text on white | 3.29:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #668BE4 text on black | 6.37:1 | AA | Lc -41.6 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CDD9F3
oklch(88.4% 0.038 265.8)
-
Step 300
300
#ACC0EE
oklch(80.9% 0.069 266.5)
-
Step 400
400
#809FE5
oklch(70.7% 0.109 265.5)
-
Step 500
500 (this color)
#668BE4
oklch(65% 0.14 265.6)
-
Step 600
600
#486DCB
oklch(55.6% 0.151 265.6)
-
Step 700
700
#3A5BB0
oklch(49.2% 0.141 265.6)
-
Step 800
800
#304A8E
oklch(42.6% 0.117 265.9)
-
Step 900
900
#2A3F72
oklch(37.8% 0.091 265.4)
-
Step 950
950
#192543
oklch(27% 0.058 266.1)
#668BE4 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) | #6694E8 | 0.024 |
| Deuteranopia (no green cones) | #5688E2 | 0.020 |
| Tritanopia (no blue cones) | #179FAC | 0.127 |
| Achromatopsia (no color) | #8E8E8E | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668BE4
#668BE4
oklch(65% 0.14 265.6)
- #B38800
#B38800
oklch(65% 0.133 86.1)
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 #668BE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.013
- Cornflower Blue #6495ED ΔE 0.027
- Dark Sky Blue #448EE4 ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.036
- Perrywinkle #8F8CE7 ΔE 0.054
- Cornflower #6A79F7 ΔE 0.057
- Lavender Blue #8B88F8 ΔE 0.058
- Dodger Blue #1E90FF ΔE 0.062
Use #668BE4 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.