#1C4386
Closest named color: Cobalt (#1E488F). oklch(39.5% 0.121 260.5), rgb(28, 67, 134).
Aa
White text reads best on this color (9.56:1).
About this color
#1C4386 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.121 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.020 away. White text reads best on it, at 9.56:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.19:1 |
| White text | 9.56:1 |
Values
| HEX | #1C4386 |
| RGB | rgb(28, 67, 134) |
| HSL | hsl(218, 65%, 32%) |
| OKLCH | oklch(39.5% 0.121 260.5) |
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 #1C4386 | 9.56:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #1C4386 | 2.19:1 | Fails | Lc 12.2 | Not readable |
| #1C4386 text on white | 9.56:1 | AAA | Lc 91.7 | Preferred for body text |
| #1C4386 text on black | 2.19:1 | Fails | Lc -10.6 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DAFB
oklch(88.4% 0.051 260.4)
-
Step 300
300
#9FC2FC
oklch(81% 0.091 260.4)
-
Step 400
400
#6AA0FA
oklch(70.8% 0.144 260.1)
-
Step 500
500
#4184F7
oklch(63% 0.185 260.4)
-
Step 600
600
#216AE6
oklch(55.5% 0.201 260.6)
-
Step 700
700
#1358C8
oklch(49.1% 0.187 260.4)
-
Step 800
800
#1349A2
oklch(42.8% 0.155 260.3)
-
Step 900
900 (this color)
#1C4386
oklch(39.5% 0.121 260.5)
-
Step 950
950
#0F254B
oklch(27% 0.076 260.5)
#1C4386 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) | #1D4A88 | 0.020 |
| Deuteranopia (no green cones) | #004185 | 0.018 |
| Tritanopia (no blue cones) | #00535E | 0.094 |
| Achromatopsia (no color) | #454545 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C4386
#1C4386
oklch(39.5% 0.121 260.5)
- #5D4100
#5D4100
oklch(39.6% 0.082 80.8)
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 #1C4386, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.020
- Twilight Blue #0A437A ΔE 0.024
- Light Navy #155084 ΔE 0.038
- Dusk Blue #26538D ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.058
- Blueberry #464196 ΔE 0.059
- Marine Blue #01386A ΔE 0.061
Use #1C4386 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.