#1C4875
Closest named color: Twilight Blue (#0A437A). oklch(39.5% 0.09 251.6), rgb(28, 72, 117).
Aa
White text reads best on this color (9.40:1).
About this color
#1C4875 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.090 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.023 away. White text reads best on it, at 9.40:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.23:1 |
| White text | 9.40:1 |
Values
| HEX | #1C4875 |
| RGB | rgb(28, 72, 117) |
| HSL | hsl(210, 61%, 28%) |
| OKLCH | oklch(39.5% 0.09 251.6) |
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 #1C4875 | 9.40:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #1C4875 | 2.23:1 | Fails | Lc 12.5 | Not readable |
| #1C4875 text on white | 9.40:1 | AAA | Lc 91.5 | Preferred for body text |
| #1C4875 text on black | 2.23:1 | Fails | Lc -10.9 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF2
oklch(88.4% 0.038 253.2)
-
Step 300
300
#A1C4EC
oklch(80.9% 0.068 252)
-
Step 400
400
#6CA5E2
oklch(70.7% 0.108 251.1)
-
Step 500
500
#428DDA
oklch(63.2% 0.138 251.4)
-
Step 600
600
#1C75C8
oklch(55.6% 0.151 251.7)
-
Step 700
700
#0B62AD
oklch(49.2% 0.14 251.7)
-
Step 800
800
#10508C
oklch(42.7% 0.117 251.9)
-
Step 900
900 (this color)
#1C4875
oklch(39.5% 0.09 251.6)
-
Step 950
950
#0F2841
oklch(27.1% 0.056 250.6)
#1C4875 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) | #334B77 | 0.027 |
| Deuteranopia (no green cones) | #264274 | 0.019 |
| Tritanopia (no blue cones) | #005359 | 0.069 |
| Achromatopsia (no color) | #464646 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C4875
#1C4875
oklch(39.5% 0.09 251.6)
- #623D00
#623D00
oklch(39.4% 0.085 71.3)
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 #1C4875, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.023
- Light Navy #155084 ΔE 0.031
- Deep Sea Blue #015482 ΔE 0.038
- Cobalt #1E488F ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.044
- Dusk Blue #26538D ΔE 0.050
- Marine Blue #01386A ΔE 0.057
- Charcoal #264653 ΔE 0.058
Use #1C4875 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.