#1C4879
Closest named color: Twilight Blue (#0A437A). oklch(39.8% 0.096 253.4), rgb(28, 72, 121).
Aa
White text reads best on this color (9.32:1).
About this color
#1C4879 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.096 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.021 away. White text reads best on it, at 9.32:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.25:1 |
| White text | 9.32:1 |
Values
| HEX | #1C4879 |
| RGB | rgb(28, 72, 121) |
| HSL | hsl(212, 62%, 29%) |
| OKLCH | oklch(39.8% 0.096 253.4) |
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 #1C4879 | 9.32:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #1C4879 | 2.25:1 | Fails | Lc 12.7 | Not readable |
| #1C4879 text on white | 9.32:1 | AAA | Lc 91.2 | Preferred for body text |
| #1C4879 text on black | 2.25:1 | Fails | Lc -11.1 | 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
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF4
oklch(88.4% 0.041 254)
-
Step 300
300
#A0C4EF
oklch(80.9% 0.072 253.1)
-
Step 400
400
#6BA4E7
oklch(70.7% 0.116 253.3)
-
Step 500
500
#418BE0
oklch(63% 0.148 253.8)
-
Step 600
600
#1A73CD
oklch(55.5% 0.16 253.5)
-
Step 700
700
#0960B2
oklch(49% 0.15 253.6)
-
Step 800
800
#0F4F90
oklch(42.7% 0.123 253.6)
-
Step 900
900 (this color)
#1C4879
oklch(39.8% 0.096 253.4)
-
Step 950
950
#0E2743
oklch(26.9% 0.061 253.2)
#1C4879 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) | #314B7B | 0.025 |
| Deuteranopia (no green cones) | #234378 | 0.015 |
| Tritanopia (no blue cones) | #00545A | 0.075 |
| Achromatopsia (no color) | #474747 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C4879
#1C4879
oklch(39.8% 0.096 253.4)
- #623F00
#623F00
oklch(39.9% 0.085 73.8)
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 #1C4879, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.021
- Light Navy #155084 ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.036
- Cobalt #1E488F ΔE 0.037
- Dusk Blue #26538D ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.051
- Marine Blue #01386A ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.061
Use #1C4879 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.