#668590
Closest named color: Steel Grey (#6F828A). oklch(59.7% 0.039 221.6), rgb(102, 133, 144).
Aa
Black text reads best on this color (5.32:1).
About this color
#668590 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 60%, its chroma 0.039 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Grey (#6F828A), ΔE 0.014 away. Black text reads best on it, at 5.32:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Steel Grey (#6F828A) |
| Black text | 5.32:1 |
| White text | 3.94:1 |
Values
| HEX | #668590 |
| RGB | rgb(102, 133, 144) |
| HSL | hsl(196, 17%, 48%) |
| OKLCH | oklch(59.7% 0.039 221.6) |
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 #668590 | 3.94:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #668590 | 5.32:1 | AA | Lc 37.3 | Non-text elements, placeholder text |
| #668590 text on white | 3.94:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #668590 text on black | 5.32:1 | AA | Lc -34.8 | 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 500.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D2DBDE
oklch(88.5% 0.011 219.6)
-
Step 300
300
#B4C4C9
oklch(81% 0.019 218.4)
-
Step 400
400
#8DA5AE
oklch(70.6% 0.03 222.5)
-
Step 500
500 (this color)
#668590
oklch(59.7% 0.039 221.6)
-
Step 600
600
#587985
oklch(55.5% 0.042 222.4)
-
Step 700
700
#486671
oklch(49.1% 0.039 222.7)
-
Step 800
800
#3B535C
oklch(42.6% 0.033 223.1)
-
Step 900
900
#33454B
oklch(37.7% 0.025 220.3)
-
Step 950
950
#1E282C
oklch(26.9% 0.016 224.2)
#668590 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) | #7E8391 | 0.032 |
| Deuteranopia (no green cones) | #787E90 | 0.030 |
| Tritanopia (no blue cones) | #598988 | 0.025 |
| Achromatopsia (no color) | #808080 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668590
#668590
oklch(59.7% 0.039 221.6)
- #94786D
#94786D
oklch(59.6% 0.039 42.5)
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 #668590, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Grey #6F828A ΔE 0.014
- Slate Gray #708090 ΔE 0.018
- Steel #738595 ΔE 0.019
- Grey Blue #647D8E ΔE 0.024
- Battleship Grey #6B7C85 ΔE 0.026
- Light Slate Gray #778899 ΔE 0.028
- Gray #808080 ΔE 0.039
- Medium Grey #7D7F7C ΔE 0.039
Use #668590 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.