#1C4C8D
Closest named color: Cobalt (#1E488F). oklch(42.1% 0.12 257.2), rgb(28, 76, 141).
Aa
White text reads best on this color (8.50:1).
About this color
#1C4C8D is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.120 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.012 away. White text reads best on it, at 8.50:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.46:1 |
| White text | 8.50:1 |
Values
| HEX | #1C4C8D |
| RGB | rgb(28, 76, 141) |
| HSL | hsl(215, 67%, 33%) |
| OKLCH | oklch(42.1% 0.12 257.2) |
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 #1C4C8D | 8.50:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #1C4C8D | 2.46:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #1C4C8D text on white | 8.50:1 | AAA | Lc 88.9 | Fine for body text |
| #1C4C8D text on black | 2.46:1 | Fails | Lc -13.3 | 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 800.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A4C3EE
oklch(80.9% 0.07 256.6)
-
Step 400
400
#73A2E6
oklch(70.7% 0.112 257.6)
-
Step 500
500
#4D8ADE
oklch(63.2% 0.142 256.9)
-
Step 600
600
#2F72CC
oklch(55.7% 0.155 257)
-
Step 700
700
#225FB0
oklch(49.2% 0.143 257)
-
Step 800
800 (this color)
#1C4C8D
oklch(42.1% 0.12 257.2)
-
Step 900
900
#1E4172
oklch(37.6% 0.093 257.3)
-
Step 950
950
#122743
oklch(27.1% 0.059 256.2)
#1C4C8D 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) | #2A528F | 0.023 |
| Deuteranopia (no green cones) | #11488C | 0.015 |
| Tritanopia (no blue cones) | #005B65 | 0.091 |
| Achromatopsia (no color) | #4D4D4D | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C4C8D
#1C4C8D
oklch(42.1% 0.12 257.2)
- #684600
#684600
oklch(42.2% 0.088 77.2)
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 #1C4C8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.012
- Light Navy #155084 ΔE 0.021
- Dusk Blue #26538D ΔE 0.023
- Deep Sea Blue #015482 ΔE 0.034
- Twilight Blue #0A437A ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.049
- Blueberry #464196 ΔE 0.057
- Denim Blue #3B5B92 ΔE 0.057
Use #1C4C8D 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.