#1B314D
Closest named color: Prussian Blue (#1D3557). oklch(31% 0.058 255.1), rgb(27, 49, 77).
Aa
White text reads best on this color (13.18:1).
About this color
#1B314D is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.058 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.021 away. White text reads best on it, at 13.18:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.59:1 |
| White text | 13.18:1 |
Values
| HEX | #1B314D |
| RGB | rgb(27, 49, 77) |
| HSL | hsl(214, 48%, 20%) |
| OKLCH | oklch(31% 0.058 255.1) |
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 #1B314D | 13.18:1 | AAA | Lc -102.6 | Preferred for body text |
| Black text on #1B314D | 1.59:1 | Fails | Lc 0.0 | Not readable |
| #1B314D text on white | 13.18:1 | AAA | Lc 99.4 | Preferred for body text |
| #1B314D text on black | 1.59:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A3C3ED
oklch(80.8% 0.069 255.4)
-
Step 400
400
#71A3E4
oklch(70.7% 0.11 255.4)
-
Step 500
500
#4A8BDC
oklch(63.2% 0.14 255.1)
-
Step 600
600
#2A73CA
oklch(55.6% 0.153 255.2)
-
Step 700
700
#1C60AF
oklch(49.2% 0.142 255.2)
-
Step 800
800
#1A4F8D
oklch(42.8% 0.117 254.9)
-
Step 900
900
#1C4271
oklch(37.7% 0.092 255.2)
-
Step 950
950 (this color)
#1B314D
oklch(31% 0.058 255.1)
#1B314D 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) | #25334E | 0.016 |
| Deuteranopia (no green cones) | #1F2E4C | 0.010 |
| Tritanopia (no blue cones) | #00373B | 0.049 |
| Achromatopsia (no color) | #303030 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B314D
#1B314D
oklch(31% 0.058 255.1)
- #412B08
#412B08
oklch(30.9% 0.058 74.4)
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 #1B314D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.021
- Space Cadet #2B2D42 ΔE 0.029
- Gunmetal #293241 ΔE 0.029
- Dark Blue Grey #1F3B4D ΔE 0.035
- Midnight Green #073B4C ΔE 0.035
- Marine #042E60 ΔE 0.041
- Oxford Blue #1B263B ΔE 0.044
- Marine Blue #01386A ΔE 0.053
Use #1B314D 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.