#1C3976
Closest named color: Twilight Blue (#0A437A). oklch(35.9% 0.11 262.9), rgb(28, 57, 118).
Aa
White text reads best on this color (11.07:1).
About this color
#1C3976 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.110 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.029 away. White text reads best on it, at 11.07:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.89:1 |
| White text | 11.07:1 |
Values
| HEX | #1C3976 |
| RGB | rgb(28, 57, 118) |
| HSL | hsl(221, 62%, 29%) |
| OKLCH | oklch(35.9% 0.11 262.9) |
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 #1C3976 | 11.07:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #1C3976 | 1.89:1 | Fails | Lc 8.6 | Not readable |
| #1C3976 text on white | 11.07:1 | AAA | Lc 95.3 | Preferred for body text |
| #1C3976 text on black | 1.89:1 | Fails | Lc -7.4 | 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
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF8
oklch(88.5% 0.045 261.9)
-
Step 300
300
#A4C1F7
oklch(80.9% 0.083 262.6)
-
Step 400
400
#749FF3
oklch(70.7% 0.132 262.8)
-
Step 500
500
#5084EF
oklch(63.1% 0.17 262.9)
-
Step 600
600
#356BDD
oklch(55.6% 0.184 262.8)
-
Step 700
700
#2858C0
oklch(49% 0.172 263)
-
Step 800
800
#22499B
oklch(42.7% 0.141 262.8)
-
Step 900
900 (this color)
#1C3976
oklch(35.9% 0.11 262.9)
-
Step 950
950
#132548
oklch(27% 0.069 262.3)
#1C3976 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) | #154078 | 0.020 |
| Deuteranopia (no green cones) | #003875 | 0.020 |
| Tritanopia (no blue cones) | #004852 | 0.088 |
| Achromatopsia (no color) | #3C3C3C | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C3976
#1C3976
oklch(35.9% 0.11 262.9)
- #503900
#503900
oklch(36.1% 0.074 83.2)
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 #1C3976, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.029
- Marine Blue #01386A ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.054
- Marine #042E60 ΔE 0.055
- Cobalt #1E488F ΔE 0.057
- Light Navy #155084 ΔE 0.068
- Dark Grey Blue #29465B ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.074
Use #1C3976 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.