#002155
Closest named color: Marine (#042E60). oklch(26.3% 0.102 259), rgb(0, 33, 85).
Aa
White text reads best on this color (15.57:1).
About this color
#002155 is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.102 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.044 away. White text reads best on it, at 15.57:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.34:1 |
| White text | 15.57:1 |
Values
| HEX | #002155 |
| RGB | rgb(0, 33, 85) |
| HSL | hsl(217, 100%, 17%) |
| OKLCH | oklch(26.3% 0.102 259) |
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 #002155 | 15.57:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #002155 | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #002155 text on white | 15.57:1 | AAA | Lc 102.0 | Preferred for body text |
| #002155 text on black | 1.34:1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFF
oklch(93.6% 0.031 258.9)
-
Step 200
200
#C3DBFF
oklch(88.5% 0.056 258.4)
-
Step 300
300
#9BC2FF
oklch(80.8% 0.097 259.2)
-
Step 400
400
#63A0FF
oklch(70.7% 0.154 259)
-
Step 500
500
#3384FF
oklch(63.1% 0.199 259)
-
Step 600
600
#006AEE
oklch(55.7% 0.215 258.9)
-
Step 700
700
#0058CA
oklch(49.1% 0.191 259.1)
-
Step 800
800
#0048A7
oklch(42.7% 0.165 259)
-
Step 900
900
#003C8D
oklch(37.8% 0.146 258.9)
-
Step 950
950 (this color)
#002155
oklch(26.3% 0.102 259)
#002155 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) | #002857 | 0.021 |
| Deuteranopia (no green cones) | #002054 | 0.003 |
| Tritanopia (no blue cones) | #002E37 | 0.077 |
| Achromatopsia (no color) | #242424 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #002155
#002155
oklch(26.3% 0.102 259)
- #332100
#332100
oklch(26.4% 0.055 78.7)
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 #002155, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.044
- Navy Blue #001146 ΔE 0.053
- Midnight Blue #191970 ΔE 0.056
- Darkblue #030764 ΔE 0.057
- Oxford Blue #1B263B ΔE 0.060
- Dark Indigo #1F0954 ΔE 0.061
- Dark Royal Blue #02066F ΔE 0.065
- Deep Blue #040273 ΔE 0.071
Use #002155 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.