#668DE3
Closest named color: Soft Blue (#6488EA). oklch(65.3% 0.136 264.5), rgb(102, 141, 227).
Aa
Black text reads best on this color (6.48:1).
About this color
#668DE3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.136 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.019 away. Black text reads best on it, at 6.48:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.48:1 |
| White text | 3.23:1 |
Values
| HEX | #668DE3 |
| RGB | rgb(102, 141, 227) |
| HSL | hsl(221, 69%, 65%) |
| OKLCH | oklch(65.3% 0.136 264.5) |
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 #668DE3 | 3.23:1 | AA large text | Lc -64.9 | Content text, not long reading |
| Black text on #668DE3 | 6.48:1 | AA | Lc 44.6 | Non-text elements, placeholder text |
| #668DE3 text on white | 3.23:1 | AA large text | Lc 59.5 | Large or bold text, headings |
| #668DE3 text on black | 6.48:1 | AA | Lc -42.2 | 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
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ABC1ED
oklch(80.9% 0.067 264.1)
-
Step 400
400
#7F9FE3
oklch(70.6% 0.106 264.5)
-
Step 500
500 (this color)
#668DE3
oklch(65.3% 0.136 264.5)
-
Step 600
600
#476EC9
oklch(55.6% 0.148 264.6)
-
Step 700
700
#385BAE
oklch(49% 0.139 264.6)
-
Step 800
800
#2F4B8D
oklch(42.7% 0.114 264.7)
-
Step 900
900
#293F70
oklch(37.6% 0.089 264.3)
-
Step 950
950
#182542
oklch(26.9% 0.057 264.6)
#668DE3 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) | #6A95E6 | 0.022 |
| Deuteranopia (no green cones) | #5A8AE1 | 0.016 |
| Tritanopia (no blue cones) | #18A0AD | 0.123 |
| Achromatopsia (no color) | #8F8F8F | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668DE3
#668DE3
oklch(65.3% 0.136 264.5)
- #B68800
#B68800
oklch(65.4% 0.134 84.5)
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 #668DE3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.019
- Cornflower Blue #6495ED ΔE 0.023
- Dark Sky Blue #448EE4 ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.034
- Perrywinkle #8F8CE7 ΔE 0.053
- Lavender Blue #8B88F8 ΔE 0.059
- Faded Blue #658CBB ΔE 0.061
- Dodger Blue #1E90FF ΔE 0.063
Use #668DE3 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.