#668CAB
Closest named color: Silver Lake Blue (#778DA9). oklch(62.4% 0.063 243.6), rgb(102, 140, 171).
Aa
Black text reads best on this color (5.90:1).
About this color
#668CAB is a medium-light, muted blue. In OKLCH its lightness is 62%, its chroma 0.063 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.022 away. Black text reads best on it, at 5.90:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 5.90:1 |
| White text | 3.55:1 |
Values
| HEX | #668CAB |
| RGB | rgb(102, 140, 171) |
| HSL | hsl(207, 29%, 54%) |
| OKLCH | oklch(62.4% 0.063 243.6) |
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 #668CAB | 3.55:1 | AA large text | Lc -68.6 | Content text, not long reading |
| Black text on #668CAB | 5.90:1 | AA | Lc 41.0 | Non-text elements, placeholder text |
| #668CAB text on white | 3.55:1 | AA large text | Lc 63.1 | Content text, not long reading |
| #668CAB text on black | 5.90:1 | AA | Lc -38.6 | 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
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE4
oklch(88.6% 0.017 242.5)
-
Step 300
300
#B0C3D4
oklch(80.8% 0.032 245.2)
-
Step 400
400
#87A5BE
oklch(70.8% 0.05 243.7)
-
Step 500
500 (this color)
#668CAB
oklch(62.4% 0.063 243.6)
-
Step 600
600
#4F7899
oklch(55.6% 0.069 243.7)
-
Step 700
700
#406582
oklch(49.1% 0.063 243.2)
-
Step 800
800
#35526A
oklch(42.6% 0.053 244.5)
-
Step 900
900
#2E4456
oklch(37.6% 0.041 243.9)
-
Step 950
950
#1B2832
oklch(27% 0.026 242)
#668CAB 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) | #7F8CAD | 0.032 |
| Deuteranopia (no green cones) | #7685AA | 0.026 |
| Tritanopia (no blue cones) | #4D9396 | 0.051 |
| Achromatopsia (no color) | #888888 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668CAB
#668CAB
oklch(62.4% 0.063 243.6)
- #A37F5F
#A37F5F
oklch(62.3% 0.064 62.9)
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 #668CAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.022
- Blue Grey #758DA3 ΔE 0.022
- Dusty Blue #5A86AD ΔE 0.024
- Faded Blue #658CBB ΔE 0.025
- Light Slate Gray #778899 ΔE 0.031
- Off Blue #5684AE ΔE 0.032
- Steel #738595 ΔE 0.035
- Slate Gray #708090 ΔE 0.045
Use #668CAB 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.