#287571
Closest named color: Dark Aquamarine (#017371). oklch(51.5% 0.074 190.2), rgb(40, 117, 113).
Aa
White text reads best on this color (5.42:1).
About this color
#287571 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.074 and its hue 190°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.017 away. White text reads best on it, at 5.42:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.87:1 |
| White text | 5.42:1 |
Values
| HEX | #287571 |
| RGB | rgb(40, 117, 113) |
| HSL | hsl(177, 49%, 31%) |
| OKLCH | oklch(51.5% 0.074 190.2) |
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 #287571 | 5.42:1 | AA | Lc -82.1 | Fine for body text |
| Black text on #287571 | 3.87:1 | AA large text | Lc 27.3 | Dividers and decoration only |
| #287571 text on white | 5.42:1 | AA | Lc 76.8 | Fine for body text |
| #287571 text on black | 3.87:1 | AA large text | Lc -25.0 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CBDEDC
oklch(88.6% 0.02 189.2)
-
Step 300
300
#A7C8C6
oklch(80.8% 0.035 192)
-
Step 400
400
#76ACA9
oklch(70.6% 0.057 191.6)
-
Step 500
500
#4F9893
oklch(63.1% 0.074 189.6)
-
Step 600
600
#2E827E
oklch(55.6% 0.08 190.7)
-
Step 700
700 (this color)
#287571
oklch(51.5% 0.074 190.2)
-
Step 800
800
#1D5A57
oklch(42.8% 0.062 190.5)
-
Step 900
900
#1F4A47
oklch(37.8% 0.048 189.2)
-
Step 950
950
#132B2A
oklch(26.9% 0.03 192)
#287571 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) | #6E6F71 | 0.078 |
| Deuteranopia (no green cones) | #626672 | 0.074 |
| Tritanopia (no blue cones) | #007874 | 0.015 |
| Achromatopsia (no color) | #6A6A6A | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #287571
#287571
oklch(51.5% 0.074 190.2)
- #8C555D
#8C555D
oklch(51.4% 0.074 10.6)
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 #287571, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.017
- Deep Turquoise #017374 ΔE 0.018
- Bluegreen #017A79 ΔE 0.019
- Deep Aqua #08787F ΔE 0.022
- Teal #008080 ΔE 0.034
- Dark Aqua #05696B ΔE 0.043
- Ocean #017B92 ΔE 0.050
- Sea Blue #047495 ΔE 0.059
Use #287571 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.