#2583DC
Closest named color: Water Blue (#0E87CC). oklch(60.2% 0.159 251.6), rgb(37, 131, 220).
Aa
Black text reads best on this color (5.35:1).
About this color
#2583DC is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.159 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.030 away. Black text reads best on it, at 5.35:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.35:1 |
| White text | 3.91:1 |
Values
| HEX | #2583DC |
| RGB | rgb(37, 131, 220) |
| HSL | hsl(209, 72%, 50%) |
| OKLCH | oklch(60.2% 0.159 251.6) |
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 #2583DC | 3.91:1 | AA large text | Lc -71.6 | Content text, not long reading |
| Black text on #2583DC | 5.35:1 | AA | Lc 38.0 | Non-text elements, placeholder text |
| #2583DC text on white | 3.91:1 | AA large text | Lc 66.1 | Content text, not long reading |
| #2583DC text on black | 5.35:1 | AA | Lc -35.6 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C5DCF6
oklch(88.6% 0.044 251.5)
-
Step 300
300
#9CC5F2
oklch(81% 0.078 251.1)
-
Step 400
400
#63A5EC
oklch(70.8% 0.125 251.6)
-
Step 500
500 (this color)
#2583DC
oklch(60.2% 0.159 251.6)
-
Step 600
600
#0074CF
oklch(55.5% 0.165 251.7)
-
Step 700
700
#0062AF
oklch(49.2% 0.144 251.3)
-
Step 800
800
#005091
oklch(42.8% 0.126 251.5)
-
Step 900
900
#0A4376
oklch(37.8% 0.103 251.2)
-
Step 950
950
#092745
oklch(26.9% 0.066 251.7)
#2583DC 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) | #5789E0 | 0.044 |
| Deuteranopia (no green cones) | #3879DA | 0.027 |
| Tritanopia (no blue cones) | #0098A5 | 0.116 |
| Achromatopsia (no color) | #818181 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2583DC
#2583DC
oklch(60.2% 0.159 251.6)
- #B07200
#B07200
oklch(60.3% 0.129 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 #2583DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.040
- Windows Blue #3778BF ΔE 0.049
- Clear Blue #247AFD ΔE 0.058
- Dodger Blue #1E90FF ΔE 0.059
- Cool Blue #4984B8 ΔE 0.060
- Soft Blue #6488EA ΔE 0.061
- Chefchaouen Blue #4895EF ΔE 0.062
Use #2583DC 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.