#1C4685
Closest named color: Cobalt (#1E488F). oklch(40.1% 0.116 258.6), rgb(28, 70, 133).
Aa
White text reads best on this color (9.27:1).
About this color
#1C4685 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.116 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.017 away. White text reads best on it, at 9.27:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.26:1 |
| White text | 9.27:1 |
Values
| HEX | #1C4685 |
| RGB | rgb(28, 70, 133) |
| HSL | hsl(216, 65%, 32%) |
| OKLCH | oklch(40.1% 0.116 258.6) |
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 #1C4685 | 9.27:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #1C4685 | 2.26:1 | Fails | Lc 12.9 | Not readable |
| #1C4685 text on white | 9.27:1 | AAA | Lc 91.0 | Preferred for body text |
| #1C4685 text on black | 2.26:1 | Fails | Lc -11.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBFA
oklch(88.6% 0.048 258)
-
Step 300
300
#9FC2F9
oklch(80.8% 0.087 259.3)
-
Step 400
400
#69A1F6
oklch(70.7% 0.139 258.5)
-
Step 500
500
#3F86F2
oklch(63% 0.177 258.8)
-
Step 600
600
#1A6DE1
oklch(55.6% 0.193 258.6)
-
Step 700
700
#0B5AC3
oklch(49% 0.179 258.6)
-
Step 800
800
#0F4A9E
oklch(42.6% 0.149 258.8)
-
Step 900
900 (this color)
#1C4685
oklch(40.1% 0.116 258.6)
-
Step 950
950
#0E2649
oklch(27.1% 0.072 258)
#1C4685 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) | #254C87 | 0.021 |
| Deuteranopia (no green cones) | #0B4384 | 0.015 |
| Tritanopia (no blue cones) | #00555F | 0.089 |
| Achromatopsia (no color) | #474747 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C4685
#1C4685
oklch(40.1% 0.116 258.6)
- #604100
#604100
oklch(40% 0.083 78.1)
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 #1C4685, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.017
- Twilight Blue #0A437A ΔE 0.024
- Light Navy #155084 ΔE 0.029
- Dusk Blue #26538D ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.059
- Blueberry #464196 ΔE 0.060
- Light Navy Blue #2E5A88 ΔE 0.064
Use #1C4685 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.