#42939D
Closest named color: Sea (#3C9992). oklch(61.7% 0.08 206.2), rgb(66, 147, 157).
Aa
Black text reads best on this color (5.89:1).
About this color
#42939D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 62%, its chroma 0.080 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.029 away. Black text reads best on it, at 5.89:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 5.89:1 |
| White text | 3.56:1 |
Values
| HEX | #42939D |
| RGB | rgb(66, 147, 157) |
| HSL | hsl(187, 41%, 44%) |
| OKLCH | oklch(61.7% 0.08 206.2) |
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 #42939D | 3.56:1 | AA large text | Lc -68.5 | Content text, not long reading |
| Black text on #42939D | 5.89:1 | AA | Lc 41.1 | Non-text elements, placeholder text |
| #42939D text on white | 3.56:1 | AA large text | Lc 63.0 | Content text, not long reading |
| #42939D text on black | 5.89:1 | AA | Lc -38.7 | 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 500.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADEE0
oklch(88.6% 0.022 204)
-
Step 300
300
#A4C8CD
oklch(80.8% 0.039 206.8)
-
Step 400
400
#71ACB4
oklch(70.7% 0.062 206.6)
-
Step 500
500 (this color)
#42939D
oklch(61.7% 0.08 206.2)
-
Step 600
600
#20818C
oklch(55.5% 0.086 206.4)
-
Step 700
700
#0E6D77
oklch(49% 0.081 206.4)
-
Step 800
800
#135961
oklch(42.7% 0.067 206.5)
-
Step 900
900
#19494F
oklch(37.6% 0.052 206.6)
-
Step 950
950
#102B2E
oklch(27% 0.033 205.1)
#42939D 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) | #888E9E | 0.078 |
| Deuteranopia (no green cones) | #7A839D | 0.072 |
| Tritanopia (no blue cones) | #009996 | 0.034 |
| Achromatopsia (no color) | #888888 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42939D
#42939D
oklch(61.7% 0.08 206.2)
- #B0726C
#B0726C
oklch(61.6% 0.08 25.7)
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 #42939D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.029
- Teal Green #0A9396 ΔE 0.029
- Dusty Teal #4C9085 ΔE 0.035
- Persian Green #2A9D8F ΔE 0.044
- Cadet Blue #5F9EA0 ΔE 0.044
- Blue Green #0F9B8E ΔE 0.045
- Teal Blue #01889F ΔE 0.048
- Dark Cyan #008B8B ΔE 0.048
Use #42939D 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.