#1858B1
Closest named color: Mid Blue (#276AB3). oklch(47.4% 0.155 258.2), rgb(24, 88, 177).
Aa
White text reads best on this color (6.84:1).
About this color
#1858B1 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.155 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.052 away. White text reads best on it, at 6.84:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.06:1 |
| White text | 6.84:1 |
Values
| HEX | #1858B1 |
| RGB | rgb(24, 88, 177) |
| HSL | hsl(215, 76%, 39%) |
| OKLCH | oklch(47.4% 0.155 258.2) |
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 #1858B1 | 6.84:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #1858B1 | 3.06:1 | AA large text | Lc 21.0 | Dividers and decoration only |
| #1858B1 text on white | 6.84:1 | AA | Lc 83.1 | Fine for body text |
| #1858B1 text on black | 3.06:1 | AA large text | Lc -18.9 | 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
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C9DBF5
oklch(88.6% 0.041 257.5)
-
Step 300
300
#A3C3F2
oklch(81% 0.075 257.9)
-
Step 400
400
#71A2EB
oklch(70.8% 0.12 258.1)
-
Step 500
500
#4A88E5
oklch(63% 0.155 258.4)
-
Step 600
600
#2B70D3
oklch(55.6% 0.168 258.1)
-
Step 700
700 (this color)
#1858B1
oklch(47.4% 0.155 258.2)
-
Step 800
800
#1B4D94
oklch(42.8% 0.128 258)
-
Step 900
900
#1C4076
oklch(37.6% 0.101 258.5)
-
Step 950
950
#112645
oklch(27% 0.064 258.1)
#1858B1 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) | #1F62B4 | 0.029 |
| Deuteranopia (no green cones) | #0054AF | 0.016 |
| Tritanopia (no blue cones) | #006E7C | 0.119 |
| Achromatopsia (no color) | #5B5B5B | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1858B1
#1858B1
oklch(47.4% 0.155 258.2)
- #7A5400
#7A5400
oklch(47.5% 0.099 78.4)
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 #1858B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.052
- Dusk Blue #26538D ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.058
- Blue Blue #2242C7 ΔE 0.063
- Cobalt #1E488F ΔE 0.067
- Peacock Blue #016795 ΔE 0.067
- Dusky Blue #475F94 ΔE 0.069
- Light Navy Blue #2E5A88 ΔE 0.069
Use #1858B1 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.