#2888E4
Closest named color: Dark Sky Blue (#448EE4). oklch(61.9% 0.163 251.8), rgb(40, 136, 228).
Aa
Black text reads best on this color (5.73:1).
About this color
#2888E4 is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.163 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.026 away. Black text reads best on it, at 5.73:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.73:1 |
| White text | 3.66:1 |
Values
| HEX | #2888E4 |
| RGB | rgb(40, 136, 228) |
| HSL | hsl(209, 78%, 53%) |
| OKLCH | oklch(61.9% 0.163 251.8) |
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 #2888E4 | 3.66:1 | AA large text | Lc -69.2 | Content text, not long reading |
| Black text on #2888E4 | 5.73:1 | AA | Lc 40.4 | Non-text elements, placeholder text |
| #2888E4 text on white | 3.66:1 | AA large text | Lc 63.7 | Content text, not long reading |
| #2888E4 text on black | 5.73:1 | AA | Lc -38.0 | 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 500.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C4DCF6
oklch(88.5% 0.044 250.4)
-
Step 300
300
#9BC5F3
oklch(81% 0.079 251.1)
-
Step 400
400
#61A5EE
oklch(70.8% 0.128 251.6)
-
Step 500
500 (this color)
#2888E4
oklch(61.9% 0.163 251.8)
-
Step 600
600
#0074D0
oklch(55.6% 0.166 251.9)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800
#005091
oklch(42.8% 0.126 251.5)
-
Step 900
900
#074278
oklch(37.6% 0.107 252.2)
-
Step 950
950
#082746
oklch(26.9% 0.068 251.9)
#2888E4 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) | #5B8FE8 | 0.047 |
| Deuteranopia (no green cones) | #3A7EE2 | 0.026 |
| Tritanopia (no blue cones) | #009EAB | 0.120 |
| Achromatopsia (no color) | #868686 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2888E4
#2888E4
oklch(61.9% 0.163 251.8)
- #B67600
#B67600
oklch(61.8% 0.133 71.8)
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 #2888E4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.026
- Water Blue #0E87CC ΔE 0.039
- Dodger Blue #1E90FF ΔE 0.043
- Chefchaouen Blue #4895EF ΔE 0.046
- Soft Blue #6488EA ΔE 0.051
- Clear Blue #247AFD ΔE 0.056
- Windows Blue #3778BF ΔE 0.064
- Cornflower Blue #6495ED ΔE 0.065
Use #2888E4 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.