#1C448B
Closest named color: Cobalt (#1E488F). oklch(40.1% 0.127 260.9), rgb(28, 68, 139).
Aa
White text reads best on this color (9.33:1).
About this color
#1C448B is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.127 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.013 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #1C448B |
| RGB | rgb(28, 68, 139) |
| HSL | hsl(218, 66%, 33%) |
| OKLCH | oklch(40.1% 0.127 260.9) |
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 #1C448B | 9.33:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #1C448B | 2.24:1 | Fails | Lc 12.8 | Not readable |
| #1C448B text on white | 9.33:1 | AAA | Lc 91.1 | Preferred for body text |
| #1C448B text on black | 2.24:1 | Fails | Lc -11.2 | 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
#E0EBFD
oklch(93.7% 0.027 260.3)
-
Step 200
200
#C6DAFD
oklch(88.5% 0.053 261.7)
-
Step 300
300
#9EC2FF
oklch(81% 0.095 260.8)
-
Step 400
400
#689FFE
oklch(70.7% 0.151 260.7)
-
Step 500
500
#3F83FD
oklch(63.1% 0.195 261)
-
Step 600
600
#1D69EC
oklch(55.7% 0.211 260.8)
-
Step 700
700
#0F56CD
oklch(49.1% 0.196 260.9)
-
Step 800
800
#1047A6
oklch(42.7% 0.163 260.9)
-
Step 900
900 (this color)
#1C448B
oklch(40.1% 0.127 260.9)
-
Step 950
950
#0E244D
oklch(26.9% 0.081 261.5)
#1C448B 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) | #194C8E | 0.022 |
| Deuteranopia (no green cones) | #00428A | 0.017 |
| Tritanopia (no blue cones) | #005561 | 0.098 |
| Achromatopsia (no color) | #474747 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C448B
#1C448B
oklch(40.1% 0.127 260.9)
- #5F4200
#5F4200
oklch(40.1% 0.083 80.2)
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 #1C448B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.013
- Twilight Blue #0A437A ΔE 0.032
- Light Navy #155084 ΔE 0.038
- Dusk Blue #26538D ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.051
- Blueberry #464196 ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.056
- Sapphire #2138AB ΔE 0.061
Use #1C448B 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.