#1857A8
Closest named color: Dusk Blue (#26538D). oklch(46.5% 0.144 257), rgb(24, 87, 168).
Aa
White text reads best on this color (7.07:1).
About this color
#1857A8 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.144 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.044 away. White text reads best on it, at 7.07:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.96:1 |
| White text | 7.07:1 |
Values
| HEX | #1857A8 |
| RGB | rgb(24, 87, 168) |
| HSL | hsl(214, 75%, 38%) |
| OKLCH | oklch(46.5% 0.144 257) |
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 #1857A8 | 7.07:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #1857A8 | 2.96:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #1857A8 text on white | 7.07:1 | AAA | Lc 84.0 | Fine for body text |
| #1857A8 text on black | 2.96:1 | Fails | Lc -18.0 | 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
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A4C3EE
oklch(80.9% 0.07 256.6)
-
Step 400
400
#73A2E6
oklch(70.7% 0.112 257.6)
-
Step 500
500
#4D8ADE
oklch(63.2% 0.142 256.9)
-
Step 600
600
#2E72CC
oklch(55.7% 0.155 256.8)
-
Step 700
700 (this color)
#1857A8
oklch(46.5% 0.144 257)
-
Step 800
800
#1D4E8F
oklch(42.8% 0.12 256.8)
-
Step 900
900
#1E4172
oklch(37.6% 0.093 257.3)
-
Step 950
950
#122743
oklch(27.1% 0.059 256.2)
#1857A8 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) | #285FAB | 0.027 |
| Deuteranopia (no green cones) | #0052A6 | 0.018 |
| Tritanopia (no blue cones) | #006B77 | 0.111 |
| Achromatopsia (no color) | #585858 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1857A8
#1857A8
oklch(46.5% 0.144 257)
- #785100
#785100
oklch(46.6% 0.098 76.8)
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 #1857A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.049
- Cobalt #1E488F ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.056
- Mid Blue #276AB3 ΔE 0.057
- Peacock Blue #016795 ΔE 0.060
- Light Navy #155084 ΔE 0.060
- Dusky Blue #475F94 ΔE 0.062
Use #1857A8 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.