#255FAD
Closest named color: Mid Blue (#276AB3). oklch(49% 0.138 257), rgb(37, 95, 173).
Aa
White text reads best on this color (6.32:1).
About this color
#255FAD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.138 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.031 away. White text reads best on it, at 6.32:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.31:1 |
| White text | 6.32:1 |
Values
| HEX | #255FAD |
| RGB | rgb(37, 95, 173) |
| HSL | hsl(214, 65%, 41%) |
| OKLCH | oklch(49% 0.138 257) |
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 #255FAD | 6.32:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #255FAD | 3.31:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #255FAD text on white | 6.32:1 | AA | Lc 81.1 | Fine for body text |
| #255FAD text on black | 3.31:1 | AA large text | Lc -20.8 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADBF2
oklch(88.6% 0.037 256)
-
Step 300
300
#A5C3EC
oklch(80.9% 0.067 256.3)
-
Step 400
400
#75A2E3
oklch(70.6% 0.108 257.5)
-
Step 500
500
#508ADB
oklch(63.1% 0.137 257.1)
-
Step 600
600
#3372C8
oklch(55.6% 0.148 257.1)
-
Step 700
700 (this color)
#255FAD
oklch(49% 0.138 257)
-
Step 800
800
#204E8C
oklch(42.6% 0.114 256.9)
-
Step 900
900
#204170
oklch(37.6% 0.09 257.5)
-
Step 950
950
#132742
oklch(27.1% 0.057 256.4)
#255FAD 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) | #3766B0 | 0.027 |
| Deuteranopia (no green cones) | #195AAB | 0.017 |
| Tritanopia (no blue cones) | #00727D | 0.108 |
| Achromatopsia (no color) | #606060 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255FAD
#255FAD
oklch(49% 0.138 257)
- #815700
#815700
oklch(49% 0.103 76.4)
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 #255FAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.031
- Denim Blue #3B5B92 ΔE 0.045
- French Blue #436BAD ΔE 0.047
- Dusky Blue #475F94 ΔE 0.050
- Peacock Blue #016795 ΔE 0.051
- Dusk Blue #26538D ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.059
- Denim #3B638C ΔE 0.059
Use #255FAD 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.