#1839C1
Closest named color: Blue Blue (#2242C7). oklch(42.8% 0.213 265.8), rgb(24, 57, 193).
Aa
White text reads best on this color (8.77:1).
About this color
#1839C1 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.213 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.025 away. White text reads best on it, at 8.77:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.213) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #1839C1 |
| RGB | rgb(24, 57, 193) |
| HSL | hsl(228, 78%, 43%) |
| OKLCH | oklch(42.8% 0.213 265.8) |
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 #1839C1 | 8.77:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #1839C1 | 2.39:1 | Fails | Lc 15.0 | Dividers and decoration only |
| #1839C1 text on white | 8.77:1 | AAA | Lc 89.0 | Fine for body text |
| #1839C1 text on black | 2.39:1 | Fails | Lc -13.3 | Not readable |
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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#739CFF
oklch(70.7% 0.152 265.7)
-
Step 500
500
#507FFF
oklch(63.1% 0.197 265.8)
-
Step 600
600
#2E5DFF
oklch(55.5% 0.245 265.8)
-
Step 700
700
#1D42EF
oklch(49.1% 0.257 265.8)
-
Step 800
800 (this color)
#1839C1
oklch(42.8% 0.213 265.8)
-
Step 900
900
#173498
oklch(37.7% 0.166 265.8)
-
Step 950
950
#0E2059
oklch(27.1% 0.105 266)
#1839C1 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) | #0053C5 | 0.057 |
| Deuteranopia (no green cones) | #0043BF | 0.021 |
| Tritanopia (no blue cones) | #006079 | 0.163 |
| Achromatopsia (no color) | #4B4B4B | 0.213 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1839C1
#1839C1
oklch(42.8% 0.213 265.8)
- #654B00
#654B00
oklch(42.9% 0.088 85.7)
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 #1839C1, closest first.
No curated palette has a color within ΔE 0.04 of #1839C1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.025
- Sapphire #2138AB ΔE 0.036
- Majorelle Blue #3F37C9 ΔE 0.044
- True Blue #010FCC ΔE 0.061
- Ultramarine Blue #1805DB ΔE 0.064
- Indigo Blue #3A18B1 ΔE 0.066
- Medium Blue #0000CD ΔE 0.069
- Pure Blue #0203E2 ΔE 0.074
Use #1839C1 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.