#2573FD
Closest named color: Clear Blue (#247AFD). oklch(59.2% 0.219 261), rgb(37, 115, 253).
Aa
Black text reads best on this color (4.94:1).
About this color
#2573FD is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.219 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.017 away. Black text reads best on it, at 4.94:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.219) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 4.94:1 |
| White text | 4.24:1 |
Values
| HEX | #2573FD |
| RGB | rgb(37, 115, 253) |
| HSL | hsl(218, 98%, 57%) |
| OKLCH | oklch(59.2% 0.219 261) |
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 #2573FD | 4.24:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #2573FD | 4.94:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #2573FD text on white | 4.24:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #2573FD text on black | 4.94:1 | AA | Lc -33.1 | 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 600.
-
Step 50
50
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C5DAFE
oklch(88.4% 0.055 261.2)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#689FFF
oklch(70.7% 0.153 260.8)
-
Step 500
500
#3D83FF
oklch(63.2% 0.198 260.8)
-
Step 600
600 (this color)
#2573FD
oklch(59.2% 0.219 261)
-
Step 700
700
#0955D1
oklch(49.2% 0.203 260.9)
-
Step 800
800
#0D46A9
oklch(42.7% 0.169 261.1)
-
Step 900
900
#133C86
oklch(37.6% 0.132 261.1)
-
Step 950
950
#0D244E
oklch(27% 0.083 261.2)
#2573FD 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) | #0085FF | 0.043 |
| Deuteranopia (no green cones) | #0072FA | 0.013 |
| Tritanopia (no blue cones) | #0096AD | 0.169 |
| Achromatopsia (no color) | #7B7B7B | 0.219 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2573FD
#2573FD
oklch(59.2% 0.219 261)
- #A37500
#A37500
oklch(59.3% 0.123 81.1)
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 #2573FD, closest first.
No curated palette has a color within ΔE 0.04 of #2573FD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.017
- Cerulean Blue #056EEE ΔE 0.029
- Bright Blue #0165FC ΔE 0.038
- Neon Blue #4361EE ΔE 0.047
- Royal Blue #4169E1 ΔE 0.048
- Azul #1D5DEC ΔE 0.059
- Cornflower #6A79F7 ΔE 0.069
- Dodger Blue #1E90FF ΔE 0.072
Use #2573FD 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.