#668A8E
Closest named color: Steel Grey (#6F828A). oklch(60.8% 0.041 204.7), rgb(102, 138, 142).
Aa
Black text reads best on this color (5.59:1).
About this color
#668A8E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.041 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Grey (#6F828A), ΔE 0.024 away. Black text reads best on it, at 5.59:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Steel Grey (#6F828A) |
| Black text | 5.59:1 |
| White text | 3.75:1 |
Values
| HEX | #668A8E |
| RGB | rgb(102, 138, 142) |
| HSL | hsl(186, 16%, 48%) |
| OKLCH | oklch(60.8% 0.041 204.7) |
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 #668A8E | 3.75:1 | AA large text | Lc -70.6 | Content text, not long reading |
| Black text on #668A8E | 5.59:1 | AA | Lc 39.0 | Non-text elements, placeholder text |
| #668A8E text on white | 3.75:1 | AA large text | Lc 65.1 | Content text, not long reading |
| #668A8E text on black | 5.59:1 | AA | Lc -36.6 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D1DBDC
oklch(88.4% 0.011 204.1)
-
Step 300
300
#B3C5C7
oklch(81% 0.02 204.8)
-
Step 400
400
#8AA7AA
oklch(70.7% 0.032 204.2)
-
Step 500
500 (this color)
#668A8E
oklch(60.8% 0.041 204.7)
-
Step 600
600
#547B7F
oklch(55.5% 0.044 204)
-
Step 700
700
#44686C
oklch(49.2% 0.042 204.7)
-
Step 800
800
#385558
oklch(42.8% 0.035 204.1)
-
Step 900
900
#314648
oklch(37.7% 0.026 203.5)
-
Step 950
950
#1D292A
oklch(27% 0.017 202.6)
#668A8E 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) | #84878E | 0.040 |
| Deuteranopia (no green cones) | #7D818E | 0.038 |
| Tritanopia (no blue cones) | #598D8B | 0.018 |
| Achromatopsia (no color) | #848484 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668A8E
#668A8E
oklch(60.8% 0.041 204.7)
- #9A7A76
#9A7A76
oklch(60.9% 0.041 26.6)
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 #668A8E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Grey #6F828A ΔE 0.024
- Steel #738595 ΔE 0.026
- Light Slate Gray #778899 ΔE 0.030
- Slate Gray #708090 ΔE 0.032
- Dusty Teal #4C9085 ΔE 0.038
- Blue Grey #758DA3 ΔE 0.039
- Battleship Grey #6B7C85 ΔE 0.039
- Grey Blue #647D8E ΔE 0.039
Use #668A8E 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.