#1851A2
Closest named color: Dusk Blue (#26538D). oklch(44.7% 0.144 258.3), rgb(24, 81, 162).
Aa
White text reads best on this color (7.67:1).
About this color
#1851A2 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.144 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.037 away. White text reads best on it, at 7.67:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.73:1 |
| White text | 7.67:1 |
Values
| HEX | #1851A2 |
| RGB | rgb(24, 81, 162) |
| HSL | hsl(215, 74%, 36%) |
| OKLCH | oklch(44.7% 0.144 258.3) |
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 #1851A2 | 7.67:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #1851A2 | 2.73:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #1851A2 text on white | 7.67:1 | AAA | Lc 86.1 | Fine for body text |
| #1851A2 text on black | 2.73:1 | Fails | Lc -15.9 | 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 800.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DBF9
oklch(88.6% 0.047 258.4)
-
Step 300
300
#9FC3F7
oklch(81% 0.084 257.5)
-
Step 400
400
#6AA1F3
oklch(70.6% 0.134 258.2)
-
Step 500
500
#4187EF
oklch(63.1% 0.172 258.4)
-
Step 600
600
#1E6EDE
oklch(55.7% 0.187 258.4)
-
Step 700
700
#0F5BC0
oklch(49.1% 0.173 258.3)
-
Step 800
800 (this color)
#1851A2
oklch(44.7% 0.144 258.3)
-
Step 900
900
#16407C
oklch(37.8% 0.112 258)
-
Step 950
950
#0E2648
oklch(27% 0.07 257.6)
#1851A2 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) | #1F5AA5 | 0.026 |
| Deuteranopia (no green cones) | #004DA0 | 0.017 |
| Tritanopia (no blue cones) | #006572 | 0.110 |
| Achromatopsia (no color) | #535353 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1851A2
#1851A2
oklch(44.7% 0.144 258.3)
- #704D00
#704D00
oklch(44.7% 0.093 78.6)
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 #1851A2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.037
- Cobalt #1E488F ΔE 0.037
- Light Navy #155084 ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.056
- Light Navy Blue #2E5A88 ΔE 0.057
- Blueberry #464196 ΔE 0.060
- Sapphire #2138AB ΔE 0.063
Use #1851A2 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.