#287663
Closest named color: Dark Aquamarine (#017371). oklch(51.3% 0.082 173.8), rgb(40, 118, 99).
Aa
White text reads best on this color (5.43:1).
About this color
#287663 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.082 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.030 away. White text reads best on it, at 5.43:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.86:1 |
| White text | 5.43:1 |
Values
| HEX | #287663 |
| RGB | rgb(40, 118, 99) |
| HSL | hsl(165, 49%, 31%) |
| OKLCH | oklch(51.3% 0.082 173.8) |
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 #287663 | 5.43:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #287663 | 3.86:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #287663 text on white | 5.43:1 | AA | Lc 76.9 | Fine for body text |
| #287663 text on black | 3.86:1 | AA large text | Lc -24.9 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CBDED8
oklch(88.5% 0.022 174.9)
-
Step 300
300
#A7C9BE
oklch(80.8% 0.04 173.7)
-
Step 400
400
#77AE9D
oklch(70.7% 0.063 173.1)
-
Step 500
500
#509A85
oklch(63.2% 0.081 173)
-
Step 600
600
#2F846F
oklch(55.6% 0.088 173.6)
-
Step 700
700 (this color)
#287663
oklch(51.3% 0.082 173.8)
-
Step 800
800
#1D5B4C
oklch(42.7% 0.068 173.9)
-
Step 900
900
#1F4B3F
oklch(37.8% 0.053 173)
-
Step 950
950
#132C25
oklch(27% 0.034 173.4)
#287663 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) | #726E62 | 0.085 |
| Deuteranopia (no green cones) | #676664 | 0.082 |
| Tritanopia (no blue cones) | #007770 | 0.022 |
| Achromatopsia (no color) | #6A6A6A | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #287663
#287663
oklch(51.3% 0.082 173.8)
- #8B526A
#8B526A
oklch(51.2% 0.082 353.6)
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 #287663, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.030
- Bluegreen #017A79 ΔE 0.033
- Deep Turquoise #017374 ΔE 0.034
- Deep Aqua #08787F ΔE 0.043
- Teal #008080 ΔE 0.045
- Dark Aqua #05696B ΔE 0.052
- Dark Green Blue #1F6357 ΔE 0.060
- Jungle Green #048243 ΔE 0.070
Use #287663 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.