#003961
Closest named color: Marine Blue (#01386A). oklch(33.5% 0.088 246.9), rgb(0, 57, 97).
Aa
White text reads best on this color (11.94:1).
About this color
#003961 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.088 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.017 away. White text reads best on it, at 11.94:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.75:1 |
| White text | 11.94:1 |
Values
| HEX | #003961 |
| RGB | rgb(0, 57, 97) |
| HSL | hsl(205, 100%, 19%) |
| OKLCH | oklch(33.5% 0.088 246.9) |
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 #003961 | 11.94:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #003961 | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #003961 text on white | 11.94:1 | AAA | Lc 96.8 | Preferred for body text |
| #003961 text on black | 1.75:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9FC5EA
oklch(80.9% 0.066 248)
-
Step 400
400
#67A6DF
oklch(70.6% 0.106 247.2)
-
Step 500
500
#388FD6
oklch(63.1% 0.135 246.9)
-
Step 600
600
#0078C3
oklch(55.7% 0.146 246.8)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900 (this color)
#003961
oklch(33.5% 0.088 246.9)
-
Step 950
950
#0C2840
oklch(26.9% 0.056 247.6)
#003961 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) | #253B63 | 0.031 |
| Deuteranopia (no green cones) | #163360 | 0.021 |
| Tritanopia (no blue cones) | #004348 | 0.062 |
| Achromatopsia (no color) | #373737 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003961
#003961
oklch(33.5% 0.088 246.9)
- #502E00
#502E00
oklch(33.6% 0.074 66.9)
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 #003961, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.017
- Prussian Blue #1D3557 ΔE 0.026
- Marine #042E60 ΔE 0.034
- Midnight Green #073B4C ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.043
- Twilight Blue #0A437A ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.060
- Gunmetal #293241 ΔE 0.063
Use #003961 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.