#2783E4
Closest named color: Dark Sky Blue (#448EE4). oklch(60.8% 0.169 253.6), rgb(39, 131, 228).
Aa
Black text reads best on this color (5.45:1).
About this color
#2783E4 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.169 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.038 away. Black text reads best on it, at 5.45:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.169) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.45:1 |
| White text | 3.85:1 |
Values
| HEX | #2783E4 |
| RGB | rgb(39, 131, 228) |
| HSL | hsl(211, 78%, 52%) |
| OKLCH | oklch(60.8% 0.169 253.6) |
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 #2783E4 | 3.85:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #2783E4 | 5.45:1 | AA | Lc 38.6 | Non-text elements, placeholder text |
| #2783E4 text on white | 3.85:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #2783E4 text on black | 5.45:1 | AA | Lc -36.2 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C5DCF8
oklch(88.6% 0.046 253.4)
-
Step 300
300
#9BC4F5
oklch(80.8% 0.082 253.2)
-
Step 400
400
#62A4F1
oklch(70.8% 0.132 253.4)
-
Step 500
500 (this color)
#2783E4
oklch(60.8% 0.169 253.6)
-
Step 600
600
#0072D5
oklch(55.5% 0.175 253.6)
-
Step 700
700
#0060B5
oklch(49.2% 0.155 253.6)
-
Step 800
800
#004E96
oklch(42.7% 0.135 253.8)
-
Step 900
900
#09417A
oklch(37.6% 0.111 253.9)
-
Step 950
950
#092747
oklch(27% 0.069 253.1)
#2783E4 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) | #518BE8 | 0.041 |
| Deuteranopia (no green cones) | #2D7AE2 | 0.023 |
| Tritanopia (no blue cones) | #009AA8 | 0.126 |
| Achromatopsia (no color) | #828282 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2783E4
#2783E4
oklch(60.8% 0.169 253.6)
- #B07400
#B07400
oklch(60.7% 0.129 73.3)
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 #2783E4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.038
- Water Blue #0E87CC ΔE 0.042
- Clear Blue #247AFD ΔE 0.046
- Dodger Blue #1E90FF ΔE 0.049
- Soft Blue #6488EA ΔE 0.056
- Chefchaouen Blue #4895EF ΔE 0.058
- Windows Blue #3778BF ΔE 0.059
- Cerulean Blue #056EEE ΔE 0.061
Use #2783E4 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.