#1857CB
Closest named color: Blue Blue (#2242C7). oklch(49.3% 0.191 261.4), rgb(24, 87, 203).
Aa
White text reads best on this color (6.43:1).
About this color
#1857CB is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.191 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.047 away. White text reads best on it, at 6.43:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.191) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.26:1 |
| White text | 6.43:1 |
Values
| HEX | #1857CB |
| RGB | rgb(24, 87, 203) |
| HSL | hsl(219, 79%, 45%) |
| OKLCH | oklch(49.3% 0.191 261.4) |
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 #1857CB | 6.43:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #1857CB | 3.26:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #1857CB text on white | 6.43:1 | AA | Lc 81.2 | Fine for body text |
| #1857CB text on black | 3.26:1 | AA large text | Lc -20.7 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFC
oklch(93.5% 0.027 262.3)
-
Step 200
200
#C7DAFC
oklch(88.5% 0.051 262.1)
-
Step 300
300
#9FC1FD
oklch(80.8% 0.093 261.6)
-
Step 400
400
#6B9FFC
oklch(70.7% 0.148 261.3)
-
Step 500
500
#4383FA
oklch(63.1% 0.19 261.5)
-
Step 600
600
#2469E9
oklch(55.6% 0.206 261.4)
-
Step 700
700 (this color)
#1857CB
oklch(49.3% 0.191 261.4)
-
Step 800
800
#1648A4
oklch(42.8% 0.158 261.3)
-
Step 900
900
#183D82
oklch(37.7% 0.124 261.4)
-
Step 950
950
#0F244C
oklch(26.9% 0.079 261.8)
#1857CB 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) | #0067CF | 0.040 |
| Deuteranopia (no green cones) | #0057C9 | 0.009 |
| Tritanopia (no blue cones) | #007488 | 0.146 |
| Achromatopsia (no color) | #5F5F5F | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1857CB
#1857CB
oklch(49.3% 0.191 261.4)
- #7E5A00
#7E5A00
oklch(49.3% 0.102 81.5)
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 #1857CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.047
- Azul #1D5DEC ΔE 0.053
- Warm Blue #4B57DB ΔE 0.054
- Mid Blue #276AB3 ΔE 0.068
- Royal Blue #4169E1 ΔE 0.069
- Majorelle Blue #3F37C9 ΔE 0.070
- Neon Blue #4361EE ΔE 0.072
- Cerulean Blue #056EEE ΔE 0.076
Use #1857CB 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.