#1C2B51
Closest named color: Prussian Blue (#1D3557). oklch(29.8% 0.072 266), rgb(28, 43, 81).
Aa
White text reads best on this color (13.87:1).
About this color
#1C2B51 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.072 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.032 away. White text reads best on it, at 13.87:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.51:1 |
| White text | 13.87:1 |
Values
| HEX | #1C2B51 |
| RGB | rgb(28, 43, 81) |
| HSL | hsl(223, 49%, 21%) |
| OKLCH | oklch(29.8% 0.072 266) |
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 #1C2B51 | 13.87:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #1C2B51 | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #1C2B51 text on white | 13.87:1 | AAA | Lc 100.3 | Preferred for body text |
| #1C2B51 text on black | 1.51:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9F9
oklch(88.4% 0.047 265.5)
-
Step 300
300
#A7C0F9
oklch(80.9% 0.086 266.1)
-
Step 400
400
#789DF6
oklch(70.7% 0.137 265.9)
-
Step 500
500
#5782F2
oklch(63.2% 0.174 265.8)
-
Step 600
600
#3E68E0
oklch(55.6% 0.189 265.9)
-
Step 700
700
#3156C3
oklch(49.2% 0.176 265.9)
-
Step 800
800
#29479E
oklch(42.8% 0.146 266)
-
Step 900
900
#253C7D
oklch(37.6% 0.114 266.3)
-
Step 950
950 (this color)
#1C2B51
oklch(29.8% 0.072 266)
#1C2B51 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) | #1A2F52 | 0.012 |
| Deuteranopia (no green cones) | #132A50 | 0.012 |
| Tritanopia (no blue cones) | #00343A | 0.063 |
| Achromatopsia (no color) | #2C2C2C | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C2B51
#1C2B51
oklch(29.8% 0.072 266)
- #3B2A00
#3B2A00
oklch(29.7% 0.061 84.8)
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 #1C2B51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.032
- Marine #042E60 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.041
- Gunmetal #293241 ΔE 0.046
- Marine Blue #01386A ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.056
- Midnight Green #073B4C ΔE 0.056
Use #1C2B51 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.