#2583EC
Closest named color: Clear Blue (#247AFD). oklch(61.3% 0.179 254.8), rgb(37, 131, 236).
Aa
Black text reads best on this color (5.53:1).
About this color
#2583EC is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.179 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.036 away. Black text reads best on it, at 5.53:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.53:1 |
| White text | 3.79:1 |
Values
| HEX | #2583EC |
| RGB | rgb(37, 131, 236) |
| HSL | hsl(212, 84%, 54%) |
| OKLCH | oklch(61.3% 0.179 254.8) |
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 #2583EC | 3.79:1 | AA large text | Lc -70.4 | Content text, not long reading |
| Black text on #2583EC | 5.53:1 | AA | Lc 39.2 | Non-text elements, placeholder text |
| #2583EC text on white | 3.79:1 | AA large text | Lc 64.9 | Content text, not long reading |
| #2583EC text on black | 5.53:1 | AA | Lc -36.8 | 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
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DBFA
oklch(88.4% 0.05 255.9)
-
Step 300
300
#9AC4F9
oklch(80.9% 0.088 254.5)
-
Step 400
400
#60A3F6
oklch(70.7% 0.14 254.7)
-
Step 500
500 (this color)
#2583EC
oklch(61.3% 0.179 254.8)
-
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
#07417E
oklch(37.8% 0.117 254.8)
-
Step 950
950
#082649
oklch(26.9% 0.074 254.8)
#2583EC 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) | #4B8CF0 | 0.039 |
| Deuteranopia (no green cones) | #1B7BEA | 0.022 |
| Tritanopia (no blue cones) | #009CAC | 0.134 |
| Achromatopsia (no color) | #838383 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2583EC
#2583EC
oklch(61.3% 0.179 254.8)
- #B17700
#B17700
oklch(61.4% 0.13 75)
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 #2583EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.036
- Dodger Blue #1E90FF ΔE 0.041
- Dark Sky Blue #448EE4 ΔE 0.041
- Water Blue #0E87CC ΔE 0.053
- Soft Blue #6488EA ΔE 0.055
- Chefchaouen Blue #4895EF ΔE 0.057
- Cerulean Blue #056EEE ΔE 0.058
- Royal Blue #4169E1 ΔE 0.065
Use #2583EC 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.