#42888C
Closest named color: Dark Cyan (#008B8B). oklch(58.3% 0.071 200.4), rgb(66, 136, 140).
Aa
Black text reads best on this color (5.13:1).
About this color
#42888C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.071 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.030 away. Black text reads best on it, at 5.13:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.13:1 |
| White text | 4.09:1 |
Values
| HEX | #42888C |
| RGB | rgb(66, 136, 140) |
| HSL | hsl(183, 36%, 40%) |
| OKLCH | oklch(58.3% 0.071 200.4) |
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 #42888C | 4.09:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #42888C | 5.13:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #42888C text on white | 4.09:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #42888C text on black | 5.13:1 | AA | Lc -33.7 | 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 600.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CCDDDE
oklch(88.5% 0.018 201.1)
-
Step 300
300
#AAC7C9
oklch(80.9% 0.031 201.7)
-
Step 400
400
#7BABAD
oklch(70.8% 0.051 199.3)
-
Step 500
500
#579699
oklch(63.2% 0.065 199.6)
-
Step 600
600 (this color)
#42888C
oklch(58.3% 0.071 200.4)
-
Step 700
700
#2B6C70
oklch(49.2% 0.066 200.8)
-
Step 800
800
#25585B
oklch(42.7% 0.054 200.5)
-
Step 900
900
#24484B
oklch(37.6% 0.042 202.6)
-
Step 950
950
#162A2C
oklch(26.9% 0.026 203.9)
#42888C 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) | #7F838C | 0.071 |
| Deuteranopia (no green cones) | #737A8C | 0.066 |
| Tritanopia (no blue cones) | #098C89 | 0.030 |
| Achromatopsia (no color) | #7D7D7D | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42888C
#42888C
oklch(58.3% 0.071 200.4)
- #A16A6A
#A16A6A
oklch(58.3% 0.071 19.4)
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 #42888C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.030
- Dusty Teal #4C9085 ΔE 0.032
- Teal Green #0A9396 ΔE 0.036
- Teal Blue #01889F ΔE 0.039
- Teal #008080 ΔE 0.047
- Grey Blue #647D8E ΔE 0.047
- Sea #3C9992 ΔE 0.049
- Steel Grey #6F828A ΔE 0.050
Use #42888C 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.