#42899D
Closest named color: Teal Blue (#01889F). oklch(59.2% 0.077 218.8), rgb(66, 137, 157).
Aa
Black text reads best on this color (5.29:1).
About this color
#42899D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.077 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.030 away. Black text reads best on it, at 5.29:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.29:1 |
| White text | 3.96:1 |
Values
| HEX | #42899D |
| RGB | rgb(66, 137, 157) |
| HSL | hsl(193, 41%, 44%) |
| OKLCH | oklch(59.2% 0.077 218.8) |
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 #42899D | 3.96:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #42899D | 5.29:1 | AA | Lc 37.3 | Non-text elements, placeholder text |
| #42899D text on white | 3.96:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #42899D text on black | 5.29:1 | AA | Lc -34.8 | 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 600.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CCDCE2
oklch(88.4% 0.019 222.2)
-
Step 300
300
#A9C6D0
oklch(80.8% 0.034 220.6)
-
Step 400
400
#79A9B8
oklch(70.6% 0.056 219.2)
-
Step 500
500
#5494A7
oklch(63.1% 0.072 219.1)
-
Step 600
600 (this color)
#42899D
oklch(59.2% 0.077 218.8)
-
Step 700
700
#286A7C
oklch(49% 0.071 219)
-
Step 800
800
#235765
oklch(42.8% 0.059 218.3)
-
Step 900
900
#224852
oklch(37.8% 0.046 217.1)
-
Step 950
950
#152A30
oklch(27% 0.029 218.2)
#42899D 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) | #7C859E | 0.066 |
| Deuteranopia (no green cones) | #6F7B9D | 0.060 |
| Tritanopia (no blue cones) | #00908F | 0.045 |
| Achromatopsia (no color) | #808080 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42899D
#42899D
oklch(59.2% 0.077 218.8)
- #A66E5C
#A66E5C
oklch(59.3% 0.077 38.6)
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 #42899D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.030
- Blue NCS #118AB2 ΔE 0.038
- Dusty Blue #5A86AD ΔE 0.038
- Off Blue #5684AE ΔE 0.040
- Stormy Blue #507B9C ΔE 0.041
- Cerulean #457B9D ΔE 0.042
- Teal Green #0A9396 ΔE 0.042
- Dark Cyan #008B8B ΔE 0.045
Use #42899D 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.