#668BBB
Closest named color: Faded Blue (#658CBB). oklch(62.9% 0.084 255.2), rgb(102, 139, 187).
Aa
Black text reads best on this color (5.97:1).
About this color
#668BBB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.084 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.003 away. Black text reads best on it, at 5.97:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.97:1 |
| White text | 3.51:1 |
Values
| HEX | #668BBB |
| RGB | rgb(102, 139, 187) |
| HSL | hsl(214, 38%, 57%) |
| OKLCH | oklch(62.9% 0.084 255.2) |
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 #668BBB | 3.51:1 | AA large text | Lc -68.1 | Content text, not long reading |
| Black text on #668BBB | 5.97:1 | AA | Lc 41.4 | Non-text elements, placeholder text |
| #668BBB text on white | 3.51:1 | AA large text | Lc 62.6 | Content text, not long reading |
| #668BBB text on black | 5.97:1 | AA | Lc -39.0 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#CFDAE8
oklch(88.4% 0.023 254.4)
-
Step 300
300
#AFC2DB
oklch(80.8% 0.041 255.3)
-
Step 400
400
#85A3CA
oklch(70.7% 0.066 255.2)
-
Step 500
500 (this color)
#668BBB
oklch(62.9% 0.084 255.2)
-
Step 600
600
#4E75A8
oklch(55.6% 0.091 255.5)
-
Step 700
700
#3F6290
oklch(49.1% 0.085 255.7)
-
Step 800
800
#345075
oklch(42.6% 0.071 255.8)
-
Step 900
900
#2D435E
oklch(37.7% 0.054 254.1)
-
Step 950
950
#1B2737
oklch(26.9% 0.034 255.8)
#668BBB 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) | #798DBD | 0.025 |
| Deuteranopia (no green cones) | #6F85BA | 0.018 |
| Tritanopia (no blue cones) | #44969C | 0.074 |
| Achromatopsia (no color) | #898989 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668BBB
#668BBB
oklch(62.9% 0.084 255.2)
- #A6814C
#A6814C
oklch(62.7% 0.084 75.2)
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 #668BBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.003
- Dusty Blue #5A86AD ΔE 0.029
- Off Blue #5684AE ΔE 0.033
- Silver Lake Blue #778DA9 ΔE 0.035
- Cool Blue #4984B8 ΔE 0.039
- Blue Grey #758DA3 ΔE 0.042
- Steel Blue #4682B4 ΔE 0.046
- Light Slate Gray #778899 ΔE 0.053
Use #668BBB 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.