#668EB6
Closest named color: Faded Blue (#658CBB). oklch(63.3% 0.075 249.1), rgb(102, 142, 182).
Aa
Black text reads best on this color (6.10:1).
About this color
#668EB6 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.075 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.011 away. Black text reads best on it, at 6.10:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.10:1 |
| White text | 3.43:1 |
Values
| HEX | #668EB6 |
| RGB | rgb(102, 142, 182) |
| HSL | hsl(210, 35%, 56%) |
| OKLCH | oklch(63.3% 0.075 249.1) |
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 #668EB6 | 3.43:1 | AA large text | Lc -67.3 | Content text, not long reading |
| Black text on #668EB6 | 6.10:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #668EB6 text on white | 3.43:1 | AA large text | Lc 61.8 | Content text, not long reading |
| #668EB6 text on black | 6.10:1 | AA | Lc -39.9 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EBF1
oklch(93.7% 0.01 247.9)
-
Step 200
200
#CFDBE6
oklch(88.6% 0.02 245.7)
-
Step 300
300
#AFC3D8
oklch(80.9% 0.037 249.6)
-
Step 400
400
#85A4C4
oklch(70.7% 0.058 249.5)
-
Step 500
500 (this color)
#668EB6
oklch(63.3% 0.075 249.1)
-
Step 600
600
#4C77A1
oklch(55.6% 0.081 248.9)
-
Step 700
700
#3D648A
oklch(49.1% 0.076 249)
-
Step 800
800
#335270
oklch(42.8% 0.062 248.7)
-
Step 900
900
#2D445B
oklch(37.8% 0.049 249.2)
-
Step 950
950
#1A2835
oklch(27% 0.031 247.2)
#668EB6 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) | #7E8FB8 | 0.031 |
| Deuteranopia (no green cones) | #7487B5 | 0.024 |
| Tritanopia (no blue cones) | #47979B | 0.064 |
| Achromatopsia (no color) | #8A8A8A | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668EB6
#668EB6
oklch(63.3% 0.075 249.1)
- #A88257
#A88257
oklch(63.3% 0.075 69.2)
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 #668EB6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.011
- Silver Lake Blue #778DA9 ΔE 0.027
- Dusty Blue #5A86AD ΔE 0.029
- Blue Grey #758DA3 ΔE 0.032
- Off Blue #5684AE ΔE 0.036
- Light Slate Gray #778899 ΔE 0.045
- Cool Blue #4984B8 ΔE 0.045
- Steel #738595 ΔE 0.050
Use #668EB6 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.