#287EE0
Closest named color: Water Blue (#0E87CC). oklch(59.5% 0.169 254.8), rgb(40, 126, 224).
Aa
Black text reads best on this color (5.15:1).
About this color
#287EE0 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.169 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.043 away. Black text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.169) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #287EE0 |
| RGB | rgb(40, 126, 224) |
| HSL | hsl(212, 75%, 52%) |
| OKLCH | oklch(59.5% 0.169 254.8) |
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 #287EE0 | 4.07:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #287EE0 | 5.15:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #287EE0 text on white | 4.07:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #287EE0 text on black | 5.15:1 | AA | Lc -34.2 | 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 500.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C5DBF8
oklch(88.4% 0.047 255.4)
-
Step 300
300
#9DC4F6
oklch(81% 0.083 254.9)
-
Step 400
400
#65A3F1
oklch(70.7% 0.132 254.9)
-
Step 500
500 (this color)
#287EE0
oklch(59.5% 0.169 254.8)
-
Step 600
600
#0071DA
oklch(55.6% 0.182 254.8)
-
Step 700
700
#005FB9
oklch(49.2% 0.161 254.8)
-
Step 800
800
#004D99
oklch(42.7% 0.14 255)
-
Step 900
900
#0E417A
oklch(37.7% 0.11 254.8)
-
Step 950
950
#0B2748
oklch(27.2% 0.07 254.7)
#287EE0 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) | #4B87E4 | 0.039 |
| Deuteranopia (no green cones) | #2476DE | 0.022 |
| Tritanopia (no blue cones) | #0095A4 | 0.126 |
| Achromatopsia (no color) | #7E7E7E | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #287EE0
#287EE0
oklch(59.5% 0.169 254.8)
- #AA7200
#AA7200
oklch(59.6% 0.126 74.9)
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 #287EE0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.043
- Clear Blue #247AFD ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.050
- Windows Blue #3778BF ΔE 0.050
- Cerulean Blue #056EEE ΔE 0.052
- Royal Blue #4169E1 ΔE 0.053
- Dodger Blue #1E90FF ΔE 0.061
- Soft Blue #6488EA ΔE 0.064
Use #287EE0 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.