#2543EB
Closest named color: Vibrant Blue (#0339F8). oklch(49.1% 0.25 266.9), rgb(37, 67, 235).
Aa
White text reads best on this color (6.81:1).
About this color
#2543EB is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.250 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Vibrant Blue (#0339F8), ΔE 0.032 away. White text reads best on it, at 6.81:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.250) |
| Temperature | cool |
| Nearest name | Vibrant Blue (#0339F8) |
| Black text | 3.08:1 |
| White text | 6.81:1 |
Values
| HEX | #2543EB |
| RGB | rgb(37, 67, 235) |
| HSL | hsl(231, 83%, 53%) |
| OKLCH | oklch(49.1% 0.25 266.9) |
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 #2543EB | 6.81:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #2543EB | 3.08:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #2543EB text on white | 6.81:1 | AA | Lc 82.3 | Fine for body text |
| #2543EB text on black | 3.08:1 | AA large text | Lc -19.6 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#769BFF
oklch(70.7% 0.152 267.2)
-
Step 500
500
#547EFF
oklch(63.1% 0.197 267)
-
Step 600
600
#355CFF
oklch(55.6% 0.244 267)
-
Step 700
700 (this color)
#2543EB
oklch(49.1% 0.25 266.9)
-
Step 800
800
#1E39BE
oklch(42.7% 0.208 266.9)
-
Step 900
900
#1C3495
oklch(37.6% 0.161 267)
-
Step 950
950
#102057
oklch(27% 0.102 266.9)
#2543EB 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) | #0064F0 | 0.067 |
| Deuteranopia (no green cones) | #0051E8 | 0.027 |
| Tritanopia (no blue cones) | #007493 | 0.191 |
| Achromatopsia (no color) | #5B5B5B | 0.251 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2543EB
#2543EB
oklch(49.1% 0.25 266.9)
- #795C00
#795C00
oklch(49.1% 0.1 87.1)
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 #2543EB, closest first.
No curated palette has a color within ΔE 0.04 of #2543EB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vibrant Blue #0339F8 ΔE 0.032
- Light Royal Blue #3A2EFE ΔE 0.040
- Electric Blue #0652FF ΔE 0.043
- Vivid Blue #152EFF ΔE 0.044
- Azul #1D5DEC ΔE 0.052
- Blue Blue #2242C7 ΔE 0.057
- Rich Blue #021BF9 ΔE 0.062
- Majorelle Blue #3F37C9 ΔE 0.064
Use #2543EB 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.