#287D8C
Closest named color: Ocean (#017B92). oklch(54.6% 0.082 211.7), rgb(40, 125, 140).
Aa
White text reads best on this color (4.77:1).
About this color
#287D8C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.082 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.018 away. White text reads best on it, at 4.77:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.40:1 |
| White text | 4.77:1 |
Values
| HEX | #287D8C |
| RGB | rgb(40, 125, 140) |
| HSL | hsl(189, 56%, 35%) |
| OKLCH | oklch(54.6% 0.082 211.7) |
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 #287D8C | 4.77:1 | AA | Lc -78.3 | Fine for body text |
| Black text on #287D8C | 4.40:1 | AA large text | Lc 31.3 | Non-text elements, placeholder text |
| #287D8C text on white | 4.77:1 | AA | Lc 72.8 | Content text, not long reading |
| #287D8C text on black | 4.40:1 | AA large text | Lc -28.9 | 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 600.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CBDDE1
oklch(88.5% 0.02 212.6)
-
Step 300
300
#A6C7CE
oklch(80.8% 0.037 212)
-
Step 400
400
#75ABB6
oklch(70.7% 0.059 211.7)
-
Step 500
500
#4D96A4
oklch(63.2% 0.076 211.6)
-
Step 600
600 (this color)
#287D8C
oklch(54.6% 0.082 211.7)
-
Step 700
700
#1D6C7A
oklch(49.1% 0.076 212.2)
-
Step 800
800
#1B5863
oklch(42.7% 0.063 211.9)
-
Step 900
900
#1E4951
oklch(37.9% 0.049 211.5)
-
Step 950
950
#132B2F
oklch(27.2% 0.031 209.5)
#287D8C 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) | #71798D | 0.076 |
| Deuteranopia (no green cones) | #636E8C | 0.069 |
| Tritanopia (no blue cones) | #008382 | 0.031 |
| Achromatopsia (no color) | #737373 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #287D8C
#287D8C
oklch(54.6% 0.082 211.7)
- #9A5E52
#9A5E52
oklch(54.6% 0.081 32)
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 #287D8C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.018
- Teal #008080 ΔE 0.028
- Deep Aqua #08787F ΔE 0.029
- Bluegreen #017A79 ΔE 0.035
- Teal Blue #01889F ΔE 0.037
- Sea Blue #047495 ΔE 0.038
- Cerulean #457B9D ΔE 0.039
- Metallic Blue #4F738E ΔE 0.043
Use #287D8C 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.