#2577FA
Closest named color: Clear Blue (#247AFD). oklch(59.7% 0.211 259.9), rgb(37, 119, 250).
Aa
Black text reads best on this color (5.09:1).
About this color
#2577FA is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.211 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.008 away. Black text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.211) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.09:1 |
| White text | 4.11:1 |
Values
| HEX | #2577FA |
| RGB | rgb(37, 119, 250) |
| HSL | hsl(217, 96%, 56%) |
| OKLCH | oklch(59.7% 0.211 259.9) |
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 #2577FA | 4.11:1 | AA large text | Lc -73.1 | Content text, not long reading |
| Black text on #2577FA | 5.09:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #2577FA text on white | 4.11:1 | AA large text | Lc 67.6 | Content text, not long reading |
| #2577FA text on black | 5.09:1 | AA | Lc -34.0 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFE
oklch(93.6% 0.029 257.8)
-
Step 200
200
#C4DBFF
oklch(88.6% 0.056 259.3)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#659FFF
oklch(70.6% 0.154 260)
-
Step 500
500 (this color)
#2577FA
oklch(59.7% 0.211 259.9)
-
Step 600
600
#0067F4
oklch(55.6% 0.226 260)
-
Step 700
700
#0056CF
oklch(49.1% 0.2 260)
-
Step 800
800
#0046AB
oklch(42.6% 0.173 259.9)
-
Step 900
900
#0C3C89
oklch(37.7% 0.138 260.1)
-
Step 950
950
#092450
oklch(27% 0.087 259.9)
#2577FA 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) | #0487FF | 0.039 |
| Deuteranopia (no green cones) | #0074F7 | 0.016 |
| Tritanopia (no blue cones) | #0097AD | 0.160 |
| Achromatopsia (no color) | #7D7D7D | 0.211 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2577FA
#2577FA
oklch(59.7% 0.211 259.9)
- #A67500
#A67500
oklch(59.7% 0.124 79.4)
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 #2577FA, closest first.
No curated palette has a color within ΔE 0.04 of #2577FA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.008
- Cerulean Blue #056EEE ΔE 0.032
- Bright Blue #0165FC ΔE 0.047
- Royal Blue #4169E1 ΔE 0.049
- Neon Blue #4361EE ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.063
- Cornflower #6A79F7 ΔE 0.064
- Azul #1D5DEC ΔE 0.066
Use #2577FA 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.