#1B2F6E
Closest named color: Marine Blue (#01386A). oklch(33% 0.112 266.8), rgb(27, 47, 110).
Aa
White text reads best on this color (12.51:1).
About this color
#1B2F6E is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.112 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.031 away. White text reads best on it, at 12.51:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.67:1 |
| White text | 12.51:1 |
Values
| HEX | #1B2F6E |
| RGB | rgb(27, 47, 110) |
| HSL | hsl(226, 61%, 27%) |
| OKLCH | oklch(33% 0.112 266.8) |
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 #1B2F6E | 12.51:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #1B2F6E | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #1B2F6E text on white | 12.51:1 | AAA | Lc 98.1 | Preferred for body text |
| #1B2F6E text on black | 1.67:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A8C0F8
oklch(81% 0.084 266.5)
-
Step 400
400
#7A9DF5
oklch(70.8% 0.135 266.6)
-
Step 500
500
#5A81F1
oklch(63.1% 0.173 267)
-
Step 600
600
#4168DF
oklch(55.6% 0.187 266.6)
-
Step 700
700
#3455C2
oklch(49.1% 0.175 266.9)
-
Step 800
800
#2B479D
oklch(42.8% 0.144 266.6)
-
Step 900
900 (this color)
#1B2F6E
oklch(33% 0.112 266.8)
-
Step 950
950
#162449
oklch(27% 0.071 266.2)
#1B2F6E 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) | #003870 | 0.028 |
| Deuteranopia (no green cones) | #00306D | 0.020 |
| Tritanopia (no blue cones) | #003E49 | 0.090 |
| Achromatopsia (no color) | #343434 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B2F6E
#1B2F6E
oklch(33% 0.112 266.8)
- #443200
#443200
oklch(32.9% 0.067 86.5)
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 #1B2F6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.031
- Marine #042E60 ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.047
- Midnight Blue #191970 ΔE 0.054
- Twilight Blue #0A437A ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.075
- Midnight Green #073B4C ΔE 0.078
- Space Cadet #2B2D42 ΔE 0.080
Use #1B2F6E 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.