#255191
Closest named color: Dusk Blue (#26538D). oklch(43.9% 0.116 258), rgb(37, 81, 145).
Aa
White text reads best on this color (7.88:1).
About this color
#255191 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.116 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.010 away. White text reads best on it, at 7.88:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.66:1 |
| White text | 7.88:1 |
Values
| HEX | #255191 |
| RGB | rgb(37, 81, 145) |
| HSL | hsl(216, 59%, 36%) |
| OKLCH | oklch(43.9% 0.116 258) |
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 #255191 | 7.88:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #255191 | 2.66:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #255191 text on white | 7.88:1 | AAA | Lc 87.0 | Fine for body text |
| #255191 text on black | 2.66:1 | Fails | Lc -15.1 | 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
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADAF3
oklch(88.4% 0.039 259.3)
-
Step 300
300
#A6C3ED
oklch(81% 0.068 257.6)
-
Step 400
400
#75A2E4
oklch(70.7% 0.109 257.8)
-
Step 500
500
#5189DC
oklch(63% 0.139 258.1)
-
Step 600
600
#3471CA
oklch(55.5% 0.152 258.1)
-
Step 700
700
#275FAF
oklch(49.2% 0.14 257.9)
-
Step 800
800 (this color)
#255191
oklch(43.9% 0.116 258)
-
Step 900
900
#214171
oklch(37.7% 0.091 258.4)
-
Step 950
950
#142642
oklch(26.9% 0.058 258.9)
#255191 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) | #325793 | 0.023 |
| Deuteranopia (no green cones) | #1E4D90 | 0.014 |
| Tritanopia (no blue cones) | #00606A | 0.091 |
| Achromatopsia (no color) | #515151 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255191
#255191
oklch(43.9% 0.116 258)
- #6D4B00
#6D4B00
oklch(43.9% 0.091 78.8)
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 #255191, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.010
- Light Navy #155084 ΔE 0.026
- Cobalt #1E488F ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.040
- Twilight #4E518B ΔE 0.050
- Blueberry #464196 ΔE 0.056
Use #255191 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.