#1859A4
Closest named color: Dusk Blue (#26538D). oklch(46.7% 0.137 255.2), rgb(24, 89, 164).
Aa
White text reads best on this color (6.99:1).
About this color
#1859A4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.137 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.038 away. White text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 3.00:1 |
| White text | 6.99:1 |
Values
| HEX | #1859A4 |
| RGB | rgb(24, 89, 164) |
| HSL | hsl(212, 74%, 37%) |
| OKLCH | oklch(46.7% 0.137 255.2) |
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 #1859A4 | 6.99:1 | AA | Lc -88.7 | Fine for body text |
| Black text on #1859A4 | 3.00:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #1859A4 text on white | 6.99:1 | AA | Lc 83.7 | Fine for body text |
| #1859A4 text on black | 3.00:1 | AA large text | Lc -18.2 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#C9DBF2
oklch(88.5% 0.037 254.6)
-
Step 300
300
#A4C3EB
oklch(80.8% 0.066 254.9)
-
Step 400
400
#73A3E2
oklch(70.7% 0.106 255.6)
-
Step 500
500
#4D8BD9
oklch(63.1% 0.135 255.1)
-
Step 600
600
#2E73C7
oklch(55.6% 0.148 255.3)
-
Step 700
700 (this color)
#1859A4
oklch(46.7% 0.137 255.2)
-
Step 800
800
#1D4F8B
oklch(42.7% 0.113 255.1)
-
Step 900
900
#1E426F
oklch(37.7% 0.088 255.3)
-
Step 950
950
#122741
oklch(27% 0.056 254.8)
#1859A4 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) | #3160A7 | 0.030 |
| Deuteranopia (no green cones) | #0F53A3 | 0.018 |
| Tritanopia (no blue cones) | #006B76 | 0.103 |
| Achromatopsia (no color) | #595959 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1859A4
#1859A4
oklch(46.7% 0.137 255.2)
- #795000
#795000
oklch(46.5% 0.098 75)
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 #1859A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.048
- Peacock Blue #016795 ΔE 0.051
- Mid Blue #276AB3 ΔE 0.054
- Cobalt #1E488F ΔE 0.055
- Dusky Blue #475F94 ΔE 0.055
- Light Navy #155084 ΔE 0.056
Use #1859A4 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.