#42AEBF
Closest named color: Turquoise Blue (#06B1C4). oklch(69.6% 0.1 209.7), rgb(66, 174, 191).
Aa
Black text reads best on this color (8.03:1).
About this color
#42AEBF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.100 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.020 away. Black text reads best on it, at 8.03:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.03:1 |
| White text | 2.61:1 |
Values
| HEX | #42AEBF |
| RGB | rgb(66, 174, 191) |
| HSL | hsl(188, 49%, 50%) |
| OKLCH | oklch(69.6% 0.1 209.7) |
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 #42AEBF | 2.61:1 | Fails | Lc -55.8 | Large or bold text, headings |
| Black text on #42AEBF | 8.03:1 | AAA | Lc 53.3 | Large or bold text, headings |
| #42AEBF text on white | 2.61:1 | Fails | Lc 50.7 | Large or bold text, headings |
| #42AEBF text on black | 8.03:1 | AAA | Lc -51.2 | 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
#EFF7F8
oklch(97% 0.009 205.9)
-
Step 100
100
#DDEDF0
oklch(93.5% 0.017 210.2)
-
Step 200
200
#C0E0E6
oklch(88.5% 0.035 210.2)
-
Step 300
300
#91CCD7
oklch(80.9% 0.062 210.4)
-
Step 400
400 (this color)
#42AEBF
oklch(69.6% 0.1 209.7)
-
Step 500
500
#009BAD
oklch(63.1% 0.109 209.2)
-
Step 600
600
#008292
oklch(55.6% 0.096 209.8)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#42AEBF 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) | #9FA8C0 | 0.094 |
| Deuteranopia (no green cones) | #8D9ABF | 0.087 |
| Tritanopia (no blue cones) | #00B6B3 | 0.039 |
| Achromatopsia (no color) | #A0A0A0 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42AEBF
#42AEBF
oklch(69.6% 0.1 209.7)
- #D48579
#D48579
oklch(69.6% 0.1 29.2)
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 #42AEBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.020
- Light Sea Green #20B2AA ΔE 0.041
- Greyblue #77A1B5 ΔE 0.053
- Topaz #13BBAF ΔE 0.053
- Cadet Blue #5F9EA0 ΔE 0.054
- Bluegrey #85A3B2 ΔE 0.064
- Greeny Blue #42B395 ΔE 0.069
- Dull Teal #5F9E8F ΔE 0.071
Use #42AEBF 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.