#1C439C
Closest named color: Cobalt (#1E488F). oklch(41.3% 0.152 263.4), rgb(28, 67, 156).
Aa
White text reads best on this color (9.00:1).
About this color
#1C439C is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.152 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.026 away. White text reads best on it, at 9.00:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #1C439C |
| RGB | rgb(28, 67, 156) |
| HSL | hsl(222, 70%, 36%) |
| OKLCH | oklch(41.3% 0.152 263.4) |
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 #1C439C | 9.00:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #1C439C | 2.33:1 | Fails | Lc 13.9 | Not readable |
| #1C439C text on white | 9.00:1 | AAA | Lc 90.1 | Preferred for body text |
| #1C439C text on black | 2.33:1 | Fails | Lc -12.2 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A3C1FB
oklch(81% 0.089 263.3)
-
Step 400
400
#719EF9
oklch(70.7% 0.143 263.3)
-
Step 500
500
#4D83F6
oklch(63.2% 0.182 263.2)
-
Step 600
600
#3269E5
oklch(55.7% 0.198 263.4)
-
Step 700
700
#2556C7
oklch(49.1% 0.184 263.4)
-
Step 800
800 (this color)
#1C439C
oklch(41.3% 0.152 263.4)
-
Step 900
900
#1F3D7F
oklch(37.7% 0.118 263.4)
-
Step 950
950
#12244B
oklch(26.9% 0.076 263.5)
#1C439C 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) | #004F9F | 0.032 |
| Deuteranopia (no green cones) | #00439A | 0.015 |
| Tritanopia (no blue cones) | #005969 | 0.117 |
| Achromatopsia (no color) | #494949 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C439C
#1C439C
oklch(41.3% 0.152 263.4)
- #614600
#614600
oklch(41.3% 0.085 83.4)
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 #1C439C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.026
- Sapphire #2138AB ΔE 0.035
- Blueberry #464196 ΔE 0.051
- Dusk Blue #26538D ΔE 0.055
- Light Navy #155084 ΔE 0.057
- Twilight Blue #0A437A ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.061
- Deep Sea Blue #015482 ΔE 0.069
Use #1C439C 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.