#1C25AD
Closest named color: Ultramarine (#2000B1). oklch(37.8% 0.208 268.6), rgb(28, 37, 173).
Aa
White text reads best on this color (10.95:1).
About this color
#1C25AD is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.208 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Ultramarine (#2000B1), ΔE 0.034 away. White text reads best on it, at 10.95:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.208) |
| Temperature | cool |
| Nearest name | Ultramarine (#2000B1) |
| Black text | 1.91:1 |
| White text | 10.95:1 |
Values
| HEX | #1C25AD |
| RGB | rgb(28, 37, 173) |
| HSL | hsl(236, 72%, 39%) |
| OKLCH | oklch(37.8% 0.208 268.6) |
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 #1C25AD | 10.95:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #1C25AD | 1.91:1 | Fails | Lc 9.9 | Not readable |
| #1C25AD text on white | 10.95:1 | AAA | Lc 94.0 | Preferred for body text |
| #1C25AD text on black | 1.91:1 | Fails | Lc -8.5 | 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 900.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A7BFFF
oklch(81% 0.095 268.4)
-
Step 400
400
#799AFF
oklch(70.6% 0.153 268.6)
-
Step 500
500
#597DFF
oklch(63.2% 0.197 268.6)
-
Step 600
600
#3D5AFF
oklch(55.6% 0.245 268.8)
-
Step 700
700
#2C30FF
oklch(49.1% 0.287 268.6)
-
Step 800
800
#231ADD
oklch(42.8% 0.266 268.6)
-
Step 900
900 (this color)
#1C25AD
oklch(37.8% 0.208 268.6)
-
Step 950
950
#0F1965
oklch(27% 0.132 268.8)
#1C25AD 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) | #0044B1 | 0.062 |
| Deuteranopia (no green cones) | #0035AB | 0.029 |
| Tritanopia (no blue cones) | #004F68 | 0.159 |
| Achromatopsia (no color) | #3C3C3C | 0.209 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C25AD
#1C25AD
oklch(37.8% 0.208 268.6)
- #523F00
#523F00
oklch(37.8% 0.077 89.3)
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 #1C25AD, closest first.
No curated palette has a color within ΔE 0.04 of #1C25AD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ultramarine #2000B1 ΔE 0.034
- Sapphire #2138AB ΔE 0.038
- Indigo Blue #3A18B1 ΔE 0.042
- Cobalt Blue #030AA7 ΔE 0.047
- True Blue #010FCC ΔE 0.056
- Royal #0C1793 ΔE 0.058
- Medium Blue #0000CD ΔE 0.061
- Imperial Purple #480CA8 ΔE 0.072
Use #1C25AD 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.