#66858E
Closest named color: Steel Grey (#6F828A). oklch(59.6% 0.038 217.5), rgb(102, 133, 142).
Aa
Black text reads best on this color (5.31:1).
About this color
#66858E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 60%, its chroma 0.038 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Grey (#6F828A), ΔE 0.013 away. Black text reads best on it, at 5.31:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Steel Grey (#6F828A) |
| Black text | 5.31:1 |
| White text | 3.95:1 |
Values
| HEX | #66858E |
| RGB | rgb(102, 133, 142) |
| HSL | hsl(194, 16%, 48%) |
| OKLCH | oklch(59.6% 0.038 217.5) |
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 #66858E | 3.95:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #66858E | 5.31:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #66858E text on white | 3.95:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #66858E text on black | 5.31:1 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D2DBDD
oklch(88.5% 0.01 212.5)
-
Step 300
300
#B4C4C8
oklch(80.9% 0.018 214.4)
-
Step 400
400
#8DA5AD
oklch(70.6% 0.029 219.9)
-
Step 500
500 (this color)
#66858E
oklch(59.6% 0.038 217.5)
-
Step 600
600
#587A83
oklch(55.7% 0.041 215.9)
-
Step 700
700
#48666F
oklch(49% 0.038 218.4)
-
Step 800
800
#3B535A
oklch(42.5% 0.031 217.7)
-
Step 900
900
#33454A
oklch(37.7% 0.024 216.7)
-
Step 950
950
#1E282B
oklch(26.9% 0.015 218)
#66858E 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) | #7F838F | 0.034 |
| Deuteranopia (no green cones) | #787E8E | 0.030 |
| Tritanopia (no blue cones) | #598888 | 0.021 |
| Achromatopsia (no color) | #808080 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66858E
#66858E
oklch(59.6% 0.038 217.5)
- #94786F
#94786F
oklch(59.7% 0.038 38.6)
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 #66858E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Grey #6F828A ΔE 0.013
- Slate Gray #708090 ΔE 0.020
- Steel #738595 ΔE 0.021
- Grey Blue #647D8E ΔE 0.024
- Battleship Grey #6B7C85 ΔE 0.025
- Light Slate Gray #778899 ΔE 0.030
- Medium Grey #7D7F7C ΔE 0.037
- Gray #808080 ΔE 0.038
Use #66858E 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.