#668DDF
Closest named color: Soft Blue (#6488EA). oklch(65.1% 0.131 263.9), rgb(102, 141, 223).
Aa
Black text reads best on this color (6.44:1).
About this color
#668DDF is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.131 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.023 away. Black text reads best on it, at 6.44:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.44:1 |
| White text | 3.26:1 |
Values
| HEX | #668DDF |
| RGB | rgb(102, 141, 223) |
| HSL | hsl(221, 65%, 64%) |
| OKLCH | oklch(65.1% 0.131 263.9) |
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 #668DDF | 3.26:1 | AA large text | Lc -65.2 | Content text, not long reading |
| Black text on #668DDF | 6.44:1 | AA | Lc 44.3 | Non-text elements, placeholder text |
| #668DDF text on white | 3.26:1 | AA large text | Lc 59.8 | Large or bold text, headings |
| #668DDF text on black | 6.44:1 | AA | Lc -42.0 | 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
#F2F5FB
oklch(97% 0.009 264.5)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#80A0E1
oklch(70.8% 0.102 263.9)
-
Step 500
500 (this color)
#668DDF
oklch(65.1% 0.131 263.9)
-
Step 600
600
#476FC6
oklch(55.6% 0.142 263.8)
-
Step 700
700
#395CAB
oklch(49% 0.133 264.1)
-
Step 800
800
#2F4C8A
oklch(42.7% 0.109 263.6)
-
Step 900
900
#2A406F
oklch(37.8% 0.085 263.9)
-
Step 950
950
#192641
oklch(27.2% 0.054 263.7)
#668DDF 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) | #6C94E2 | 0.021 |
| Deuteranopia (no green cones) | #5D89DD | 0.016 |
| Tritanopia (no blue cones) | #209FAB | 0.118 |
| Achromatopsia (no color) | #8E8E8E | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668DDF
#668DDF
oklch(65.1% 0.131 263.9)
- #B5870E
#B5870E
oklch(65.1% 0.131 83.7)
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 #668DDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.023
- Cornflower Blue #6495ED ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.036
- Perrywinkle #8F8CE7 ΔE 0.054
- Faded Blue #658CBB ΔE 0.055
- Lavender Blue #8B88F8 ΔE 0.063
- Dodger Blue #1E90FF ΔE 0.066
Use #668DDF 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.