#42756B
Closest named color: Bluegreen (#017A79). oklch(52.3% 0.058 179.9), rgb(66, 117, 107).
Aa
White text reads best on this color (5.26:1).
About this color
#42756B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.058 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.036 away. White text reads best on it, at 5.26:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 3.98:1 |
| White text | 5.26:1 |
Values
| HEX | #42756B |
| RGB | rgb(66, 117, 107) |
| HSL | hsl(168, 28%, 36%) |
| OKLCH | oklch(52.3% 0.058 179.9) |
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 #42756B | 5.26:1 | AA | Lc -81.4 | Fine for body text |
| Black text on #42756B | 3.98:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #42756B text on white | 5.26:1 | AA | Lc 76.1 | Fine for body text |
| #42756B text on black | 3.98:1 | AA large text | Lc -25.7 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CFDDD9
oklch(88.6% 0.016 177)
-
Step 300
300
#AEC7C1
oklch(80.9% 0.028 179.5)
-
Step 400
400
#83AAA1
oklch(70.7% 0.044 179.2)
-
Step 500
500
#62958B
oklch(63.1% 0.057 180.7)
-
Step 600
600
#487F75
oklch(55.5% 0.061 181)
-
Step 700
700 (this color)
#42756B
oklch(52.3% 0.058 179.9)
-
Step 800
800
#2F5850
oklch(42.8% 0.048 179.8)
-
Step 900
900
#2B4842
oklch(37.7% 0.037 179.7)
-
Step 950
950
#192A27
oklch(26.9% 0.023 182.2)
#42756B 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) | #71706B | 0.061 |
| Deuteranopia (no green cones) | #68696C | 0.058 |
| Tritanopia (no blue cones) | #2F7772 | 0.017 |
| Achromatopsia (no color) | #6C6C6C | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42756B
#42756B
oklch(52.3% 0.058 179.9)
- #865C68
#865C68
oklch(52.3% 0.057 0.6)
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 #42756B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.036
- Dark Aquamarine #017371 ΔE 0.039
- Deep Turquoise #017374 ΔE 0.039
- Deep Aqua #08787F ΔE 0.040
- Teal #008080 ΔE 0.044
- Slate #516572 ΔE 0.056
- Dim Gray #696969 ΔE 0.058
- Dark Aqua #05696B ΔE 0.059
Use #42756B 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.