#255FD5
Closest named color: Azul (#1D5DEC). oklch(52% 0.192 262.3), rgb(37, 95, 213).
Aa
White text reads best on this color (5.71:1).
About this color
#255FD5 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.192 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.036 away. White text reads best on it, at 5.71:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.67:1 |
| White text | 5.71:1 |
Values
| HEX | #255FD5 |
| RGB | rgb(37, 95, 213) |
| HSL | hsl(220, 70%, 49%) |
| OKLCH | oklch(52% 0.192 262.3) |
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 #255FD5 | 5.71:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #255FD5 | 3.67:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #255FD5 text on white | 5.71:1 | AA | Lc 77.9 | Fine for body text |
| #255FD5 text on black | 3.67:1 | AA large text | Lc -23.8 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFC
oklch(93.5% 0.027 262.3)
-
Step 200
200
#C7DAFC
oklch(88.5% 0.051 262.1)
-
Step 300
300
#A0C1FD
oklch(80.9% 0.093 262.1)
-
Step 400
400
#6D9EFC
oklch(70.6% 0.148 262.4)
-
Step 500
500
#4683FA
oklch(63.2% 0.189 262.1)
-
Step 600
600
#2968E9
oklch(55.5% 0.206 262.3)
-
Step 700
700 (this color)
#255FD5
oklch(52% 0.192 262.3)
-
Step 800
800
#1947A4
oklch(42.7% 0.159 262.2)
-
Step 900
900
#1A3D82
oklch(37.7% 0.123 262.1)
-
Step 950
950
#10244C
oklch(26.9% 0.079 262.4)
#255FD5 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) | #006FD9 | 0.040 |
| Deuteranopia (no green cones) | #005FD3 | 0.015 |
| Tritanopia (no blue cones) | #007C91 | 0.146 |
| Achromatopsia (no color) | #666666 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255FD5
#255FD5
oklch(52% 0.192 262.3)
- #876200
#876200
oklch(52.1% 0.107 82.7)
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 #255FD5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.036
- Warm Blue #4B57DB ΔE 0.039
- Royal Blue #4169E1 ΔE 0.042
- Neon Blue #4361EE ΔE 0.048
- Cerulean Blue #056EEE ΔE 0.051
- Bright Blue #0165FC ΔE 0.061
- Mid Blue #276AB3 ΔE 0.063
- Electric Blue #0652FF ΔE 0.071
Use #255FD5 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.