#42A2BB
Closest named color: Cadet Blue (#5F9EA0). oklch(66.6% 0.096 218), rgb(66, 162, 187).
Aa
Black text reads best on this color (7.11:1).
About this color
#42A2BB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 67%, its chroma 0.096 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.042 away. Black text reads best on it, at 7.11:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.11:1 |
| White text | 2.95:1 |
Values
| HEX | #42A2BB |
| RGB | rgb(66, 162, 187) |
| HSL | hsl(192, 48%, 50%) |
| OKLCH | oklch(66.6% 0.096 218) |
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 #42A2BB | 2.95:1 | Fails | Lc -61.1 | Content text, not long reading |
| Black text on #42A2BB | 7.11:1 | AAA | Lc 48.3 | Large or bold text, headings |
| #42A2BB text on white | 2.95:1 | Fails | Lc 55.7 | Large or bold text, headings |
| #42A2BB text on black | 7.11:1 | AAA | Lc -46.0 | 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 500.
-
Step 50
50
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C7DEE5
oklch(88.6% 0.026 218)
-
Step 300
300
#9FC9D5
oklch(81% 0.047 217.1)
-
Step 400
400
#68ACC0
oklch(70.7% 0.075 218.7)
-
Step 500
500 (this color)
#42A2BB
oklch(66.6% 0.096 218)
-
Step 600
600
#00819A
oklch(55.7% 0.1 217.7)
-
Step 700
700
#006C82
oklch(49.1% 0.088 218.4)
-
Step 800
800
#00596B
oklch(42.8% 0.077 217.7)
-
Step 900
900
#0C4958
oklch(37.6% 0.063 219.1)
-
Step 950
950
#0B2B33
oklch(27% 0.039 217.4)
#42A2BB 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) | #929EBC | 0.083 |
| Deuteranopia (no green cones) | #8091BB | 0.073 |
| Tritanopia (no blue cones) | #00ABAA | 0.048 |
| Achromatopsia (no color) | #969696 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42A2BB
#42A2BB
oklch(66.6% 0.096 218)
- #C77F68
#C77F68
oklch(66.6% 0.096 38.5)
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 #42A2BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.042
- Turquoise Blue #06B1C4 ΔE 0.042
- Greyblue #77A1B5 ΔE 0.048
- Light Sea Green #20B2AA ΔE 0.061
- Sea #3C9992 ΔE 0.062
- Dull Teal #5F9E8F ΔE 0.064
- Bluegrey #85A3B2 ΔE 0.066
- Faded Blue #658CBB ΔE 0.066
Use #42A2BB 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.