#668BB9
Closest named color: Faded Blue (#658CBB). oklch(62.8% 0.081 254.3), rgb(102, 139, 185).
Aa
Black text reads best on this color (5.95:1).
About this color
#668BB9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.081 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.004 away. Black text reads best on it, at 5.95:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.95:1 |
| White text | 3.52:1 |
Values
| HEX | #668BB9 |
| RGB | rgb(102, 139, 185) |
| HSL | hsl(213, 37%, 56%) |
| OKLCH | oklch(62.8% 0.081 254.3) |
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 #668BB9 | 3.52:1 | AA large text | Lc -68.2 | Content text, not long reading |
| Black text on #668BB9 | 5.95:1 | AA | Lc 41.3 | Non-text elements, placeholder text |
| #668BB9 text on white | 3.52:1 | AA large text | Lc 62.7 | Content text, not long reading |
| #668BB9 text on black | 5.95:1 | AA | Lc -38.9 | 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
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#CFDAE8
oklch(88.4% 0.023 254.4)
-
Step 300
300
#B0C3DA
oklch(81% 0.039 253.3)
-
Step 400
400
#86A3C8
oklch(70.7% 0.063 254.7)
-
Step 500
500 (this color)
#668BB9
oklch(62.8% 0.081 254.3)
-
Step 600
600
#4E75A6
oklch(55.5% 0.089 254.7)
-
Step 700
700
#3F638E
oklch(49.2% 0.081 253.7)
-
Step 800
800
#345174
oklch(42.8% 0.068 253.8)
-
Step 900
900
#2E435D
oklch(37.7% 0.052 254.2)
-
Step 950
950
#1B2737
oklch(26.9% 0.034 255.8)
#668BB9 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) | #798DBB | 0.025 |
| Deuteranopia (no green cones) | #6F85B8 | 0.019 |
| Tritanopia (no blue cones) | #45959B | 0.071 |
| Achromatopsia (no color) | #888888 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668BB9
#668BB9
oklch(62.8% 0.081 254.3)
- #A6814F
#A6814F
oklch(62.8% 0.081 73.8)
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 #668BB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.004
- Dusty Blue #5A86AD ΔE 0.027
- Off Blue #5684AE ΔE 0.032
- Silver Lake Blue #778DA9 ΔE 0.033
- Cool Blue #4984B8 ΔE 0.039
- Blue Grey #758DA3 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.046
- Light Slate Gray #778899 ΔE 0.050
Use #668BB9 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.