#255498
Closest named color: Dusk Blue (#26538D). oklch(45.1% 0.122 258), rgb(37, 84, 152).
Aa
White text reads best on this color (7.49:1).
About this color
#255498 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.122 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.018 away. White text reads best on it, at 7.49:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.80:1 |
| White text | 7.49:1 |
Values
| HEX | #255498 |
| RGB | rgb(37, 84, 152) |
| HSL | hsl(215, 61%, 37%) |
| OKLCH | oklch(45.1% 0.122 258) |
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 #255498 | 7.49:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #255498 | 2.80:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #255498 text on white | 7.49:1 | AAA | Lc 85.7 | Fine for body text |
| #255498 text on black | 2.80:1 | Fails | Lc -16.3 | 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 800.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#C9DBF4
oklch(88.6% 0.04 256.6)
-
Step 300
300
#A4C3EF
oklch(81% 0.071 257.1)
-
Step 400
400
#73A2E7
oklch(70.7% 0.114 257.9)
-
Step 500
500
#4D89E0
oklch(63.1% 0.146 257.8)
-
Step 600
600
#3071CE
oklch(55.6% 0.158 257.9)
-
Step 700
700
#225EB3
oklch(49.1% 0.149 258)
-
Step 800
800 (this color)
#255498
oklch(45.1% 0.122 258)
-
Step 900
900
#1E4173
oklch(37.7% 0.095 257.6)
-
Step 950
950
#122643
oklch(26.9% 0.06 257.7)
#255498 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) | #325A9B | 0.023 |
| Deuteranopia (no green cones) | #1C5097 | 0.014 |
| Tritanopia (no blue cones) | #00646E | 0.096 |
| Achromatopsia (no color) | #555555 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255498
#255498
oklch(45.1% 0.122 258)
- #724E00
#724E00
oklch(45.2% 0.094 78.1)
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 #255498, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.018
- Denim Blue #3B5B92 ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.036
- Light Navy #155084 ΔE 0.037
- Cobalt #1E488F ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.043
- Twilight #4E518B ΔE 0.051
- Dusky Blue #475F94 ΔE 0.053
Use #255498 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.