#1F3441
Closest named color: Gunmetal (#293241). oklch(31.3% 0.036 236.7), rgb(31, 52, 65).
Aa
White text reads best on this color (12.91:1).
About this color
#1F3441 is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.036 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.015 away. White text reads best on it, at 12.91:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.62:1 |
| White text | 12.91:1 |
Values
| HEX | #1F3441 |
| RGB | rgb(31, 52, 65) |
| HSL | hsl(203, 35%, 19%) |
| OKLCH | oklch(31.3% 0.036 236.7) |
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 #1F3441 | 12.91:1 | AAA | Lc -102.3 | Preferred for body text |
| Black text on #1F3441 | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #1F3441 text on white | 12.91:1 | AAA | Lc 99.0 | Preferred for body text |
| #1F3441 text on black | 1.62:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A8C5D9
oklch(80.8% 0.042 238.2)
-
Step 400
400
#78A7C6
oklch(70.6% 0.068 237.9)
-
Step 500
500
#5391B7
oklch(63% 0.086 237.2)
-
Step 600
600
#347BA3
oklch(55.6% 0.094 236.7)
-
Step 700
700
#26688C
oklch(49.2% 0.087 236.5)
-
Step 800
800
#225571
oklch(42.8% 0.071 235.9)
-
Step 900
900
#21465C
oklch(37.7% 0.057 237)
-
Step 950
950 (this color)
#1F3441
oklch(31.3% 0.036 236.7)
#1F3441 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) | #2E3442 | 0.022 |
| Deuteranopia (no green cones) | #293041 | 0.018 |
| Tritanopia (no blue cones) | #103738 | 0.027 |
| Achromatopsia (no color) | #313131 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F3441
#1F3441
oklch(31.3% 0.036 236.7)
- #3F2D1F
#3F2D1F
oklch(31.4% 0.035 58.9)
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 #1F3441, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.015
- Dark Blue Grey #1F3B4D ΔE 0.028
- Space Cadet #2B2D42 ΔE 0.028
- Midnight Green #073B4C ΔE 0.029
- Onyx #343A40 ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.039
- Oxford Blue #1B263B ΔE 0.048
- Dark #1B2431 ΔE 0.057
Use #1F3441 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.