#1855B7
Closest named color: Blue Blue (#2242C7). oklch(47.2% 0.167 260), rgb(24, 85, 183).
Aa
White text reads best on this color (6.94:1).
About this color
#1855B7 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.167 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.051 away. White text reads best on it, at 6.94:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.02:1 |
| White text | 6.94:1 |
Values
| HEX | #1855B7 |
| RGB | rgb(24, 85, 183) |
| HSL | hsl(217, 77%, 41%) |
| OKLCH | oklch(47.2% 0.167 260) |
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 #1855B7 | 6.94:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #1855B7 | 3.02:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #1855B7 text on white | 6.94:1 | AA | Lc 83.4 | Fine for body text |
| #1855B7 text on black | 3.02:1 | AA large text | Lc -18.5 | 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
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DAF8
oklch(88.4% 0.046 260.7)
-
Step 300
300
#A2C2F5
oklch(80.9% 0.081 259.6)
-
Step 400
400
#70A1F1
oklch(70.8% 0.129 259.8)
-
Step 500
500
#4986EC
oklch(63% 0.166 260.1)
-
Step 600
600
#2B6EDA
oklch(55.7% 0.179 259.7)
-
Step 700
700 (this color)
#1855B7
oklch(47.2% 0.167 260)
-
Step 800
800
#1B4B99
oklch(42.7% 0.138 259.8)
-
Step 900
900
#1C3F7A
oklch(37.7% 0.109 260.2)
-
Step 950
950
#112647
oklch(27.1% 0.067 259.1)
#1855B7 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) | #0061BA | 0.031 |
| Deuteranopia (no green cones) | #0053B5 | 0.012 |
| Tritanopia (no blue cones) | #006D7D | 0.128 |
| Achromatopsia (no color) | #5A5A5A | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1855B7
#1855B7
oklch(47.2% 0.167 260)
- #785400
#785400
oklch(47.2% 0.098 79.9)
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 #1855B7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.051
- Mid Blue #276AB3 ΔE 0.061
- Dusk Blue #26538D ΔE 0.067
- Denim Blue #3B5B92 ΔE 0.070
- Cobalt #1E488F ΔE 0.071
- Sapphire #2138AB ΔE 0.071
- Majorelle Blue #3F37C9 ΔE 0.074
- Warm Blue #4B57DB ΔE 0.076
Use #1855B7 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.