#1C3553
Closest named color: Prussian Blue (#1D3557). oklch(32.5% 0.062 254), rgb(28, 53, 83).
Aa
White text reads best on this color (12.47:1).
About this color
#1C3553 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.062 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.007 away. White text reads best on it, at 12.47:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.68:1 |
| White text | 12.47:1 |
Values
| HEX | #1C3553 |
| RGB | rgb(28, 53, 83) |
| HSL | hsl(213, 50%, 22%) |
| OKLCH | oklch(32.5% 0.062 254) |
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 #1C3553 | 12.47:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #1C3553 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #1C3553 text on white | 12.47:1 | AAA | Lc 98.2 | Preferred for body text |
| #1C3553 text on black | 1.68:1 | 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 900.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CEDAEA
oklch(88.4% 0.026 255.6)
-
Step 300
300
#ACC3DF
oklch(80.9% 0.047 253.5)
-
Step 400
400
#80A3CF
oklch(70.6% 0.076 254.4)
-
Step 500
500
#608CC2
oklch(63.1% 0.095 254.1)
-
Step 600
600
#4675AF
oklch(55.5% 0.105 254.5)
-
Step 700
700
#376296
oklch(49% 0.097 254.2)
-
Step 800
800
#2E507A
oklch(42.6% 0.081 254.6)
-
Step 900
900 (this color)
#1C3553
oklch(32.5% 0.062 254)
-
Step 950
950
#192739
oklch(26.9% 0.039 255.1)
#1C3553 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) | #283754 | 0.018 |
| Deuteranopia (no green cones) | #213152 | 0.013 |
| Tritanopia (no blue cones) | #003C40 | 0.052 |
| Achromatopsia (no color) | #343434 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C3553
#1C3553
oklch(32.5% 0.062 254)
- #472E08
#472E08
oklch(32.4% 0.062 72.7)
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 #1C3553, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.007
- Dark Blue Grey #1F3B4D ΔE 0.026
- Midnight Green #073B4C ΔE 0.030
- Gunmetal #293241 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.038
- Marine #042E60 ΔE 0.041
- Marine Blue #01386A ΔE 0.042
- Onyx #343A40 ΔE 0.053
Use #1C3553 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.