#003C5D
Closest named color: Prussian Blue (#1D3557). oklch(34.1% 0.08 241.1), rgb(0, 60, 93).
Aa
White text reads best on this color (11.63:1).
About this color
#003C5D is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.080 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.027 away. White text reads best on it, at 11.63:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.80:1 |
| White text | 11.63:1 |
Values
| HEX | #003C5D |
| RGB | rgb(0, 60, 93) |
| HSL | hsl(201, 100%, 18%) |
| OKLCH | oklch(34.1% 0.08 241.1) |
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 #003C5D | 11.63:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #003C5D | 1.80:1 | Fails | Lc 7.6 | Not readable |
| #003C5D text on white | 11.63:1 | AAA | Lc 96.3 | Preferred for body text |
| #003C5D text on black | 1.80:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C7DDED
oklch(88.6% 0.032 239.4)
-
Step 300
300
#9FC6E4
oklch(80.9% 0.06 241.6)
-
Step 400
400
#67A8D7
oklch(70.7% 0.096 241.3)
-
Step 500
500
#3792CC
oklch(63.2% 0.122 240.8)
-
Step 600
600
#007BB8
oklch(55.7% 0.13 241.1)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900 (this color)
#003C5D
oklch(34.1% 0.08 241.1)
-
Step 950
950
#0B293D
oklch(27% 0.051 241.6)
#003C5D 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) | #2C3D5E | 0.038 |
| Deuteranopia (no green cones) | #1F355C | 0.028 |
| Tritanopia (no blue cones) | #004448 | 0.052 |
| Achromatopsia (no color) | #383838 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003C5D
#003C5D
oklch(34.1% 0.08 241.1)
- #552D00
#552D00
oklch(34.2% 0.079 61.3)
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 #003C5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.027
- Marine Blue #01386A ΔE 0.028
- Midnight Green #073B4C ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.033
- Marine #042E60 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.050
- Charcoal #264653 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.053
Use #003C5D 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.