#668291
Closest named color: Slate Gray (#708090). oklch(59% 0.039 231.7), rgb(102, 130, 145).
Aa
Black text reads best on this color (5.16:1).
About this color
#668291 is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.039 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Gray (#708090), ΔE 0.013 away. Black text reads best on it, at 5.16:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Slate Gray (#708090) |
| Black text | 5.16:1 |
| White text | 4.06:1 |
Values
| HEX | #668291 |
| RGB | rgb(102, 130, 145) |
| HSL | hsl(201, 17%, 48%) |
| OKLCH | oklch(59% 0.039 231.7) |
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 #668291 | 4.06:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #668291 | 5.16:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #668291 text on white | 4.06:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #668291 text on black | 5.16:1 | AA | Lc -33.8 | 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 600.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D3DADE
oklch(88.4% 0.009 232.4)
-
Step 300
300
#B6C3CA
oklch(80.9% 0.017 231)
-
Step 400
400
#90A4AF
oklch(70.7% 0.028 231.8)
-
Step 500
500
#748E9C
oklch(63.1% 0.036 231.6)
-
Step 600
600 (this color)
#668291
oklch(59% 0.039 231.7)
-
Step 700
700
#4C6572
oklch(49.2% 0.036 231)
-
Step 800
800
#3E525D
oklch(42.6% 0.031 232.5)
-
Step 900
900
#35444C
oklch(37.7% 0.024 231.5)
-
Step 950
950
#1F282D
oklch(27% 0.016 232.4)
#668291 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) | #7B8192 | 0.028 |
| Deuteranopia (no green cones) | #757C91 | 0.025 |
| Tritanopia (no blue cones) | #598687 | 0.028 |
| Achromatopsia (no color) | #7E7E7E | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668291
#668291
oklch(59% 0.039 231.7)
- #917768
#917768
oklch(59% 0.04 51.6)
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 #668291, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Gray #708090 ΔE 0.013
- Grey Blue #647D8E ΔE 0.015
- Steel Grey #6F828A ΔE 0.015
- Steel #738595 ΔE 0.021
- Battleship Grey #6B7C85 ΔE 0.021
- Light Slate Gray #778899 ΔE 0.031
- Lavender Gray #7E7F9A ΔE 0.038
- Battleship Gray #6C757D ΔE 0.040
Use #668291 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.