#1855AB
Closest named color: Dusk Blue (#26538D). oklch(46.3% 0.151 258.3), rgb(24, 85, 171).
Aa
White text reads best on this color (7.17:1).
About this color
#1855AB is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.151 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.048 away. White text reads best on it, at 7.17:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.92:1 |
| White text | 7.17:1 |
Values
| HEX | #1855AB |
| RGB | rgb(24, 85, 171) |
| HSL | hsl(215, 75%, 38%) |
| OKLCH | oklch(46.3% 0.151 258.3) |
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 #1855AB | 7.17:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #1855AB | 2.92:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #1855AB text on white | 7.17:1 | AAA | Lc 84.4 | Fine for body text |
| #1855AB text on black | 2.92:1 | Fails | Lc -17.6 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C9DAF5
oklch(88.4% 0.042 259.6)
-
Step 300
300
#A4C2F0
oklch(80.8% 0.073 258.8)
-
Step 400
400
#72A2E9
oklch(70.7% 0.117 258)
-
Step 500
500
#4D89E2
oklch(63.2% 0.148 258.2)
-
Step 600
600
#2F70D0
oklch(55.5% 0.163 258.4)
-
Step 700
700 (this color)
#1855AB
oklch(46.3% 0.151 258.3)
-
Step 800
800
#1E4D92
oklch(42.8% 0.125 258.4)
-
Step 900
900
#1E4174
oklch(37.8% 0.096 258)
-
Step 950
950
#122644
oklch(26.9% 0.062 258.3)
#1855AB 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) | #1F5EAE | 0.026 |
| Deuteranopia (no green cones) | #0051A9 | 0.016 |
| Tritanopia (no blue cones) | #006A78 | 0.115 |
| Achromatopsia (no color) | #575757 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1855AB
#1855AB
oklch(46.3% 0.151 258.3)
- #765100
#765100
oklch(46.3% 0.097 78.3)
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 #1855AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.048
- Cobalt #1E488F ΔE 0.055
- Denim Blue #3B5B92 ΔE 0.055
- Mid Blue #276AB3 ΔE 0.061
- Light Navy Blue #2E5A88 ΔE 0.063
- Blue Blue #2242C7 ΔE 0.064
- Light Navy #155084 ΔE 0.064
- Peacock Blue #016795 ΔE 0.067
Use #1855AB 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.