#1C375A
Closest named color: Prussian Blue (#1D3557). oklch(33.4% 0.07 255.7), rgb(28, 55, 90).
Aa
White text reads best on this color (12.04:1).
About this color
#1C375A is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.070 and its hue 256°. 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 12.04:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.74:1 |
| White text | 12.04:1 |
Values
| HEX | #1C375A |
| RGB | rgb(28, 55, 90) |
| HSL | hsl(214, 53%, 23%) |
| OKLCH | oklch(33.4% 0.07 255.7) |
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 #1C375A | 12.04:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #1C375A | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #1C375A text on white | 12.04:1 | AAA | Lc 97.4 | Preferred for body text |
| #1C375A text on black | 1.74:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#ABC3E3
oklch(81% 0.052 255.7)
-
Step 400
400
#7DA3D5
oklch(70.7% 0.085 255.5)
-
Step 500
500
#5C8BCA
oklch(63% 0.109 256.1)
-
Step 600
600
#4174B7
oklch(55.5% 0.118 255.9)
-
Step 700
700
#33619D
oklch(49% 0.109 255.9)
-
Step 800
800
#2B507F
oklch(42.7% 0.089 255.3)
-
Step 900
900 (this color)
#1C375A
oklch(33.4% 0.07 255.7)
-
Step 950
950
#17273C
oklch(27% 0.045 255.6)
#1C375A 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) | #28395B | 0.017 |
| Deuteranopia (no green cones) | #1F3459 | 0.009 |
| Tritanopia (no blue cones) | #003F44 | 0.057 |
| Achromatopsia (no color) | #363636 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C375A
#1C375A
oklch(33.4% 0.07 255.7)
- #4B3000
#4B3000
oklch(33.3% 0.07 75)
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 #1C375A, 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 0.030
- Marine Blue #01386A ΔE 0.032
- Midnight Green #073B4C ΔE 0.036
- Marine #042E60 ΔE 0.040
- Gunmetal #293241 ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.053
Use #1C375A 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.