#42656D
Closest named color: Slate (#516572). oklch(48.3% 0.042 213.6), rgb(66, 101, 109).
Aa
White text reads best on this color (6.33:1).
About this color
#42656D is a medium-dark, muted teal or cyan. In OKLCH its lightness is 48%, its chroma 0.042 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.022 away. White text reads best on it, at 6.33:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.31:1 |
| White text | 6.33:1 |
Values
| HEX | #42656D |
| RGB | rgb(66, 101, 109) |
| HSL | hsl(191, 25%, 34%) |
| OKLCH | oklch(48.3% 0.042 213.6) |
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 #42656D | 6.33:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #42656D | 3.31:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #42656D text on white | 6.33:1 | AA | Lc 81.5 | Fine for body text |
| #42656D text on black | 3.31:1 | AA large text | Lc -20.4 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D1DBDE
oklch(88.5% 0.012 217.6)
-
Step 300
300
#B3C4C9
oklch(80.9% 0.02 217.3)
-
Step 400
400
#8AA6AD
oklch(70.6% 0.033 214.6)
-
Step 500
500
#6D9099
oklch(63% 0.041 215.3)
-
Step 600
600
#547B83
oklch(55.7% 0.045 211.8)
-
Step 700
700 (this color)
#42656D
oklch(48.3% 0.042 213.6)
-
Step 800
800
#38545B
oklch(42.6% 0.035 215.1)
-
Step 900
900
#31464A
oklch(37.8% 0.027 210.6)
-
Step 950
950
#1D292C
oklch(27.1% 0.017 214.8)
#42656D 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) | #5F636D | 0.039 |
| Deuteranopia (no green cones) | #585D6D | 0.036 |
| Tritanopia (no blue cones) | #316867 | 0.024 |
| Achromatopsia (no color) | #5F5F5F | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42656D
#42656D
oklch(48.3% 0.042 213.6)
- #74564F
#74564F
oklch(48.2% 0.042 33.5)
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 #42656D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.022
- Dark Aqua #05696B ΔE 0.042
- YInMn Blue #415A77 ΔE 0.043
- Deep Turquoise #017374 ΔE 0.051
- Dark Green Blue #1F6357 ΔE 0.052
- Petrol #005F6A ΔE 0.052
- Dark Aquamarine #017371 ΔE 0.053
- Dusty Grape #545775 ΔE 0.053
Use #42656D 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.