#42ACC1
Closest named color: Turquoise Blue (#06B1C4). oklch(69.2% 0.1 213.2), rgb(66, 172, 193).
Aa
Black text reads best on this color (7.90:1).
About this color
#42ACC1 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 69%, its chroma 0.100 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.022 away. Black text reads best on it, at 7.90:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.90:1 |
| White text | 2.65:1 |
Values
| HEX | #42ACC1 |
| RGB | rgb(66, 172, 193) |
| HSL | hsl(190, 51%, 51%) |
| OKLCH | oklch(69.2% 0.1 213.2) |
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 #42ACC1 | 2.65:1 | Fails | Lc -56.6 | Large or bold text, headings |
| Black text on #42ACC1 | 7.90:1 | AAA | Lc 52.6 | Large or bold text, headings |
| #42ACC1 text on white | 2.65:1 | Fails | Lc 51.4 | Large or bold text, headings |
| #42ACC1 text on black | 7.90:1 | AAA | Lc -50.5 | 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
#EFF7F9
oklch(97.1% 0.009 214.3)
-
Step 100
100
#DDEDF1
oklch(93.5% 0.018 214.4)
-
Step 200
200
#C0E0E7
oklch(88.6% 0.035 212.4)
-
Step 300
300
#92CCD9
oklch(81% 0.062 213.1)
-
Step 400
400 (this color)
#42ACC1
oklch(69.2% 0.1 213.2)
-
Step 500
500
#009AB1
oklch(63% 0.11 213.1)
-
Step 600
600
#008295
oklch(55.7% 0.097 212.5)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005967
oklch(42.6% 0.075 213)
-
Step 900
900
#004A56
oklch(37.6% 0.066 213)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#42ACC1 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) | #9CA6C2 | 0.091 |
| Deuteranopia (no green cones) | #8A99C1 | 0.083 |
| Tritanopia (no blue cones) | #00B4B2 | 0.042 |
| Achromatopsia (no color) | #9F9F9F | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42ACC1
#42ACC1
oklch(69.2% 0.1 213.2)
- #D28573
#D28573
oklch(69.2% 0.099 33.9)
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 #42ACC1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.022
- Light Sea Green #20B2AA ΔE 0.047
- Greyblue #77A1B5 ΔE 0.050
- Cadet Blue #5F9EA0 ΔE 0.053
- Topaz #13BBAF ΔE 0.060
- Bluegrey #85A3B2 ΔE 0.063
- Bluey Grey #89A0B0 ΔE 0.070
- Dull Teal #5F9E8F ΔE 0.072
Use #42ACC1 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.