#012B4F
Closest named color: Marine (#042E60). oklch(28.4% 0.079 249.9), rgb(1, 43, 79).
Aa
White text reads best on this color (14.38:1).
About this color
#012B4F is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.079 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.032 away. White text reads best on it, at 14.38:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.45:1 |
| White text | 14.38:1 |
Values
| HEX | #012B4F |
| RGB | rgb(1, 43, 79) |
| HSL | hsl(208, 98%, 16%) |
| OKLCH | oklch(28.4% 0.079 249.9) |
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 #012B4F | 14.38:1 | AAA | Lc -103.8 | Preferred for body text |
| Black text on #012B4F | 1.45:1 | Fails | Lc 0.0 | Not readable |
| #012B4F text on white | 14.38:1 | AAA | Lc 100.8 | Preferred for body text |
| #012B4F text on black | 1.45:1 | 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
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DDECFC
oklch(93.7% 0.027 249.9)
-
Step 200
200
#C0DDFB
oklch(88.6% 0.052 249.3)
-
Step 300
300
#92C6FB
oklch(81% 0.093 249.5)
-
Step 400
400
#4DA5FA
oklch(70.6% 0.151 250.1)
-
Step 500
500
#008CEF
oklch(63% 0.178 249.9)
-
Step 600
600
#0076CA
oklch(55.7% 0.156 249.7)
-
Step 700
700
#0063AB
oklch(49.2% 0.138 249.7)
-
Step 800
800
#00518E
oklch(42.8% 0.121 249.9)
-
Step 900
900
#004377
oklch(37.7% 0.106 249.9)
-
Step 950
950 (this color)
#012B4F
oklch(28.4% 0.079 249.9)
#012B4F 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) | #192E50 | 0.025 |
| Deuteranopia (no green cones) | #0A274E | 0.013 |
| Tritanopia (no blue cones) | #003439 | 0.057 |
| Achromatopsia (no color) | #2A2A2A | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #012B4F
#012B4F
oklch(28.4% 0.079 249.9)
- #3D2300
#3D2300
oklch(28.3% 0.062 69)
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 #012B4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.032
- Oxford Blue #1B263B ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.054
- Midnight Green #073B4C ΔE 0.057
- Dark #1B2431 ΔE 0.058
- Gunmetal #293241 ΔE 0.059
- Marine Blue #01386A ΔE 0.060
Use #012B4F 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.