#42A6BB
Closest named color: Turquoise Blue (#06B1C4). oklch(67.5% 0.096 214), rgb(66, 166, 187).
Aa
Black text reads best on this color (7.40:1).
About this color
#42A6BB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 68%, its chroma 0.096 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.033 away. Black text reads best on it, at 7.40:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.40:1 |
| White text | 2.83:1 |
Values
| HEX | #42A6BB |
| RGB | rgb(66, 166, 187) |
| HSL | hsl(190, 48%, 50%) |
| OKLCH | oklch(67.5% 0.096 214) |
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 #42A6BB | 2.83:1 | Fails | Lc -59.4 | Large or bold text, headings |
| Black text on #42A6BB | 7.40:1 | AAA | Lc 49.9 | Large or bold text, headings |
| #42A6BB text on white | 2.83:1 | Fails | Lc 54.1 | Large or bold text, headings |
| #42A6BB text on black | 7.40:1 | AAA | Lc -47.7 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DEEDF1
oklch(93.6% 0.017 215.5)
-
Step 200
200
#C1DFE7
oklch(88.4% 0.034 215.6)
-
Step 300
300
#94CBD8
oklch(80.8% 0.06 213.9)
-
Step 400
400 (this color)
#42A6BB
oklch(67.5% 0.096 214)
-
Step 500
500
#009AB2
oklch(63.1% 0.111 213.9)
-
Step 600
600
#008196
oklch(55.5% 0.098 214.4)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#002C35
oklch(27% 0.048 215.4)
#42A6BB 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) | #97A1BC | 0.087 |
| Deuteranopia (no green cones) | #8594BB | 0.079 |
| Tritanopia (no blue cones) | #00AEAC | 0.043 |
| Achromatopsia (no color) | #999999 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42A6BB
#42A6BB
oklch(67.5% 0.096 214)
- #CB816F
#CB816F
oklch(67.6% 0.096 34.4)
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 #42A6BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.033
- Cadet Blue #5F9EA0 ΔE 0.042
- Greyblue #77A1B5 ΔE 0.047
- Light Sea Green #20B2AA ΔE 0.051
- Dull Teal #5F9E8F ΔE 0.063
- Bluegrey #85A3B2 ΔE 0.063
- Sea #3C9992 ΔE 0.065
- Bluey Grey #89A0B0 ΔE 0.068
Use #42A6BB 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.