#1C3572
Closest named color: Marine Blue (#01386A). oklch(34.7% 0.11 264.6), rgb(28, 53, 114).
Aa
White text reads best on this color (11.65:1).
About this color
#1C3572 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.110 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.025 away. White text reads best on it, at 11.65:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.80:1 |
| White text | 11.65:1 |
Values
| HEX | #1C3572 |
| RGB | rgb(28, 53, 114) |
| HSL | hsl(223, 61%, 28%) |
| OKLCH | oklch(34.7% 0.11 264.6) |
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 #1C3572 | 11.65:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #1C3572 | 1.80:1 | Fails | Lc 7.4 | Not readable |
| #1C3572 text on white | 11.65:1 | AAA | Lc 96.4 | Preferred for body text |
| #1C3572 text on black | 1.80:1 | Fails | Lc 0.0 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CAD9F8
oklch(88.4% 0.046 264.9)
-
Step 300
300
#A6C0F7
oklch(80.8% 0.083 264.9)
-
Step 400
400
#779EF3
oklch(70.7% 0.132 264.6)
-
Step 500
500
#5583EE
oklch(63% 0.168 264.6)
-
Step 600
600
#3B6ADD
oklch(55.6% 0.183 264.4)
-
Step 700
700
#2E57C0
oklch(49% 0.171 264.7)
-
Step 800
800
#27489B
oklch(42.7% 0.141 264.7)
-
Step 900
900 (this color)
#1C3572
oklch(34.7% 0.11 264.6)
-
Step 950
950
#152448
oklch(26.9% 0.07 265)
#1C3572 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) | #0F3D74 | 0.023 |
| Deuteranopia (no green cones) | #003571 | 0.020 |
| Tritanopia (no blue cones) | #00444E | 0.089 |
| Achromatopsia (no color) | #383838 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C3572
#1C3572
oklch(34.7% 0.11 264.6)
- #4B3600
#4B3600
oklch(34.7% 0.071 84.3)
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 #1C3572, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.025
- Twilight Blue #0A437A ΔE 0.041
- Marine #042E60 ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.048
- Cobalt #1E488F ΔE 0.070
- Midnight Blue #191970 ΔE 0.070
- Dark Blue Grey #1F3B4D ΔE 0.072
- Dark Grey Blue #29465B ΔE 0.075
Use #1C3572 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.