#668BB1
Closest named color: Faded Blue (#658CBB). oklch(62.4% 0.071 249.7), rgb(102, 139, 177).
Aa
Black text reads best on this color (5.89:1).
About this color
#668BB1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.071 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.015 away. Black text reads best on it, at 5.89:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.89:1 |
| White text | 3.56:1 |
Values
| HEX | #668BB1 |
| RGB | rgb(102, 139, 177) |
| HSL | hsl(210, 32%, 55%) |
| OKLCH | oklch(62.4% 0.071 249.7) |
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 #668BB1 | 3.56:1 | AA large text | Lc -68.7 | Content text, not long reading |
| Black text on #668BB1 | 5.89:1 | AA | Lc 40.9 | Non-text elements, placeholder text |
| #668BB1 text on white | 3.56:1 | AA large text | Lc 63.2 | Content text, not long reading |
| #668BB1 text on black | 5.89:1 | AA | Lc -38.5 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EAF0
oklch(93.5% 0.01 252.8)
-
Step 200
200
#D0DAE6
oklch(88.4% 0.02 252.9)
-
Step 300
300
#B0C3D7
oklch(80.9% 0.035 249.6)
-
Step 400
400
#87A4C2
oklch(70.7% 0.055 249.5)
-
Step 500
500 (this color)
#668BB1
oklch(62.4% 0.071 249.7)
-
Step 600
600
#4F779F
oklch(55.6% 0.077 249.4)
-
Step 700
700
#406488
oklch(49.2% 0.071 249.5)
-
Step 800
800
#35516E
oklch(42.6% 0.059 250.2)
-
Step 900
900
#2E4459
oklch(37.8% 0.046 248)
-
Step 950
950
#1B2834
oklch(27.1% 0.029 246.9)
#668BB1 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) | #7C8CB3 | 0.029 |
| Deuteranopia (no green cones) | #7384B0 | 0.024 |
| Tritanopia (no blue cones) | #4A9498 | 0.061 |
| Achromatopsia (no color) | #888888 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668BB1
#668BB1
oklch(62.4% 0.071 249.7)
- #A38057
#A38057
oklch(62.4% 0.071 70.3)
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 #668BB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.015
- Dusty Blue #5A86AD ΔE 0.021
- Silver Lake Blue #778DA9 ΔE 0.026
- Off Blue #5684AE ΔE 0.029
- Blue Grey #758DA3 ΔE 0.029
- Light Slate Gray #778899 ΔE 0.039
- Cool Blue #4984B8 ΔE 0.041
- Steel #738595 ΔE 0.042
Use #668BB1 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.