#00285D
Closest named color: Marine (#042E60). oklch(28.8% 0.104 257.5), rgb(0, 40, 93).
Aa
White text reads best on this color (14.36:1).
About this color
#00285D is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.104 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.020 away. White text reads best on it, at 14.36:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.46:1 |
| White text | 14.36:1 |
Values
| HEX | #00285D |
| RGB | rgb(0, 40, 93) |
| HSL | hsl(214, 100%, 18%) |
| OKLCH | oklch(28.8% 0.104 257.5) |
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 #00285D | 14.36:1 | AAA | Lc -103.6 | Preferred for body text |
| Black text on #00285D | 1.46:1 | Fails | Lc 0.0 | Not readable |
| #00285D text on white | 14.36:1 | AAA | Lc 100.6 | Preferred for body text |
| #00285D text on black | 1.46:1 | 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
#DDEBFF
oklch(93.6% 0.031 257.2)
-
Step 200
200
#C2DBFF
oklch(88.5% 0.057 257.5)
-
Step 300
300
#99C3FF
oklch(80.9% 0.097 257.3)
-
Step 400
400
#5FA1FF
oklch(70.7% 0.154 257.4)
-
Step 500
500
#2985FF
oklch(63.1% 0.2 257.5)
-
Step 600
600
#006DE5
oklch(55.6% 0.201 257.4)
-
Step 700
700
#005BC2
oklch(49% 0.177 257.5)
-
Step 800
800
#004AA1
oklch(42.6% 0.155 257.6)
-
Step 900
900
#003E88
oklch(37.8% 0.136 257.4)
-
Step 950
950 (this color)
#00285D
oklch(28.8% 0.104 257.5)
#00285D 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) | #002E5F | 0.018 |
| Deuteranopia (no green cones) | #00265C | 0.006 |
| Tritanopia (no blue cones) | #00353E | 0.078 |
| Achromatopsia (no color) | #2A2A2A | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00285D
#00285D
oklch(28.8% 0.104 257.5)
- #3B2600
#3B2600
oklch(28.7% 0.06 77.2)
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 #00285D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.020
- Midnight Blue #191970 ΔE 0.051
- Marine Blue #01386A ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.065
- Darkblue #030764 ΔE 0.071
- Dark Royal Blue #02066F ΔE 0.072
- Space Cadet #2B2D42 ΔE 0.073
Use #00285D 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.