#668BC0
Closest named color: Faded Blue (#658CBB). oklch(63.1% 0.091 257.4), rgb(102, 139, 192).
Aa
Black text reads best on this color (6.01:1).
About this color
#668BC0 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.091 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.009 away. Black text reads best on it, at 6.01:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.01:1 |
| White text | 3.48:1 |
Values
| HEX | #668BC0 |
| RGB | rgb(102, 139, 192) |
| HSL | hsl(215, 42%, 58%) |
| OKLCH | oklch(63.1% 0.091 257.4) |
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 #668BC0 | 3.48:1 | AA large text | Lc -67.8 | Content text, not long reading |
| Black text on #668BC0 | 6.01:1 | AA | Lc 41.7 | Non-text elements, placeholder text |
| #668BC0 text on white | 3.48:1 | AA large text | Lc 62.4 | Content text, not long reading |
| #668BC0 text on black | 6.01:1 | AA | Lc -39.3 | 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
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AFC2DE
oklch(80.9% 0.045 258)
-
Step 400
400
#85A2CD
oklch(70.6% 0.071 258.1)
-
Step 500
500 (this color)
#668BC0
oklch(63.1% 0.091 257.4)
-
Step 600
600
#4D74AC
oklch(55.5% 0.098 257.4)
-
Step 700
700
#3E6194
oklch(49% 0.092 257.7)
-
Step 800
800
#335078
oklch(42.8% 0.075 256.7)
-
Step 900
900
#2D4261
oklch(37.6% 0.06 258)
-
Step 950
950
#1B2739
oklch(27.1% 0.038 258.3)
#668BC0 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) | #778EC2 | 0.024 |
| Deuteranopia (no green cones) | #6C85BF | 0.017 |
| Tritanopia (no blue cones) | #41979D | 0.081 |
| Achromatopsia (no color) | #898989 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668BC0
#668BC0
oklch(63.1% 0.091 257.4)
- #A88246
#A88246
oklch(63.1% 0.091 77.3)
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 #668BC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.009
- Dusty Blue #5A86AD ΔE 0.034
- Off Blue #5684AE ΔE 0.038
- Cool Blue #4984B8 ΔE 0.040
- Silver Lake Blue #778DA9 ΔE 0.042
- Steel Blue #4682B4 ΔE 0.048
- Blue Grey #758DA3 ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.060
Use #668BC0 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.