#255EC5
Closest named color: Mid Blue (#276AB3). oklch(50.6% 0.172 261.1), rgb(37, 94, 197).
Aa
White text reads best on this color (6.02:1).
About this color
#255EC5 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.172 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.046 away. White text reads best on it, at 6.02:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.48:1 |
| White text | 6.02:1 |
Values
| HEX | #255EC5 |
| RGB | rgb(37, 94, 197) |
| HSL | hsl(219, 68%, 46%) |
| OKLCH | oklch(50.6% 0.172 261.1) |
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 #255EC5 | 6.02:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #255EC5 | 3.48:1 | AA large text | Lc 24.5 | Dividers and decoration only |
| #255EC5 text on white | 6.02:1 | AA | Lc 79.6 | Fine for body text |
| #255EC5 text on black | 3.48:1 | AA large text | Lc -22.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAF8
oklch(88.4% 0.046 260.7)
-
Step 300
300
#A3C2F7
oklch(81% 0.083 261)
-
Step 400
400
#70A0F3
oklch(70.7% 0.133 260.8)
-
Step 500
500
#4B85EF
oklch(63.1% 0.171 261.3)
-
Step 600
600
#2E6CDD
oklch(55.6% 0.185 261.2)
-
Step 700
700 (this color)
#255EC5
oklch(50.6% 0.172 261.1)
-
Step 800
800
#1D4A9B
oklch(42.7% 0.141 261)
-
Step 900
900
#1D3F7B
oklch(37.8% 0.11 260.8)
-
Step 950
950
#122548
oklch(27% 0.07 261.5)
#255EC5 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) | #126AC9 | 0.031 |
| Deuteranopia (no green cones) | #005CC3 | 0.018 |
| Tritanopia (no blue cones) | #007788 | 0.133 |
| Achromatopsia (no color) | #636363 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255EC5
#255EC5
oklch(50.6% 0.172 261.1)
- #835D00
#835D00
oklch(50.5% 0.104 80.8)
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 #255EC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.046
- Warm Blue #4B57DB ΔE 0.053
- Royal Blue #4169E1 ΔE 0.059
- Azul #1D5DEC ΔE 0.060
- French Blue #436BAD ΔE 0.063
- Blue Blue #2242C7 ΔE 0.067
- Iris #6258C4 ΔE 0.069
- Neon Blue #4361EE ΔE 0.071
Use #255EC5 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.