#287EDD
Closest named color: Water Blue (#0E87CC). oklch(59.3% 0.165 254.3), rgb(40, 126, 221).
Aa
Black text reads best on this color (5.11:1).
About this color
#287EDD is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.165 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.040 away. Black text reads best on it, at 5.11:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.11:1 |
| White text | 4.10:1 |
Values
| HEX | #287EDD |
| RGB | rgb(40, 126, 221) |
| HSL | hsl(211, 73%, 51%) |
| OKLCH | oklch(59.3% 0.165 254.3) |
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 #287EDD | 4.10:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #287EDD | 5.11:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #287EDD text on white | 4.10:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #287EDD text on black | 5.11:1 | AA | Lc -34.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF5
oklch(88.5% 0.042 255)
-
Step 300
300
#A0C4F0
oklch(81% 0.074 253.7)
-
Step 400
400
#6BA4E9
oklch(70.8% 0.118 254)
-
Step 500
500
#408BE3
oklch(63.2% 0.152 254.3)
-
Step 600
600 (this color)
#287EDD
oklch(59.3% 0.165 254.3)
-
Step 700
700
#0760B5
oklch(49.2% 0.154 254.1)
-
Step 800
800
#0E4E92
oklch(42.6% 0.128 254.5)
-
Step 900
900
#154275
oklch(37.8% 0.1 254.2)
-
Step 950
950
#0E2744
oklch(27% 0.062 253.9)
#287EDD 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) | #4D86E1 | 0.038 |
| Deuteranopia (no green cones) | #2976DB | 0.021 |
| Tritanopia (no blue cones) | #0095A3 | 0.124 |
| Achromatopsia (no color) | #7D7D7D | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #287EDD
#287EDD
oklch(59.3% 0.165 254.3)
- #A97100
#A97100
oklch(59.3% 0.125 74.7)
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 #287EDD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.040
- Windows Blue #3778BF ΔE 0.046
- Clear Blue #247AFD ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.051
- Cerulean Blue #056EEE ΔE 0.054
- Royal Blue #4169E1 ΔE 0.055
- Dodger Blue #1E90FF ΔE 0.064
- Soft Blue #6488EA ΔE 0.065
Use #287EDD 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.