#1857BC
Closest named color: Blue Blue (#2242C7). oklch(48% 0.171 260), rgb(24, 87, 188).
Aa
White text reads best on this color (6.71:1).
About this color
#1857BC is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.171 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 6.71:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.12:1 |
| White text | 6.71:1 |
Values
| HEX | #1857BC |
| RGB | rgb(24, 87, 188) |
| HSL | hsl(217, 77%, 42%) |
| OKLCH | oklch(48% 0.171 260) |
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 #1857BC | 6.71:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #1857BC | 3.12:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #1857BC text on white | 6.71:1 | AA | Lc 82.5 | Fine for body text |
| #1857BC text on black | 3.12:1 | AA large text | Lc -19.4 | 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
#A2C2F7
oklch(80.9% 0.083 260.4)
-
Step 400
400
#6EA0F3
oklch(70.6% 0.134 260.1)
-
Step 500
500
#4886EE
oklch(63.1% 0.169 260.1)
-
Step 600
600
#296DDD
oklch(55.6% 0.185 260.1)
-
Step 700
700 (this color)
#1857BC
oklch(48% 0.171 260)
-
Step 800
800
#194A9B
oklch(42.6% 0.143 260.1)
-
Step 900
900
#1B3F7B
oklch(37.7% 0.11 260)
-
Step 950
950
#112548
oklch(26.9% 0.07 260.7)
#1857BC 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) | #0063C0 | 0.031 |
| Deuteranopia (no green cones) | #0055BA | 0.012 |
| Tritanopia (no blue cones) | #007081 | 0.130 |
| Achromatopsia (no color) | #5C5C5C | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1857BC
#1857BC
oklch(48% 0.171 260)
- #7B5600
#7B5600
oklch(48% 0.1 79.7)
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 #1857BC, 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 0.058
- Warm Blue #4B57DB ΔE 0.069
- Denim Blue #3B5B92 ΔE 0.075
- Majorelle Blue #3F37C9 ΔE 0.075
- Dusk Blue #26538D ΔE 0.075
- French Blue #436BAD ΔE 0.076
- Azul #1D5DEC ΔE 0.076
Use #1857BC 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.