#1D313F
Closest named color: Gunmetal (#293241). oklch(30.3% 0.036 240.1), rgb(29, 49, 63).
Aa
White text reads best on this color (13.43:1).
About this color
#1D313F is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.036 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.018 away. White text reads best on it, at 13.43:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.56:1 |
| White text | 13.43:1 |
Values
| HEX | #1D313F |
| RGB | rgb(29, 49, 63) |
| HSL | hsl(205, 37%, 18%) |
| OKLCH | oklch(30.3% 0.036 240.1) |
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 #1D313F | 13.43:1 | AAA | Lc -103.0 | Preferred for body text |
| Black text on #1D313F | 1.56:1 | Fails | Lc 0.0 | Not readable |
| #1D313F text on white | 13.43:1 | AAA | Lc 99.8 | Preferred for body text |
| #1D313F text on black | 1.56:1 | 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
#CCDCE8
oklch(88.6% 0.024 240.1)
-
Step 300
300
#A8C5DA
oklch(80.9% 0.043 239.6)
-
Step 400
400
#79A7C7
oklch(70.7% 0.068 239.3)
-
Step 500
500
#5590B9
oklch(63% 0.088 240.4)
-
Step 600
600
#377AA5
oklch(55.5% 0.095 239.8)
-
Step 700
700
#29678E
oklch(49.2% 0.089 239.8)
-
Step 800
800
#245473
oklch(42.7% 0.073 239.9)
-
Step 900
900
#23455D
oklch(37.6% 0.057 241.3)
-
Step 950
950 (this color)
#1D313F
oklch(30.3% 0.036 240.1)
#1D313F 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) | #2B3140 | 0.021 |
| Deuteranopia (no green cones) | #262D3F | 0.018 |
| Tritanopia (no blue cones) | #0D3436 | 0.028 |
| Achromatopsia (no color) | #2F2F2F | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D313F
#1D313F
oklch(30.3% 0.036 240.1)
- #3C2A1C
#3C2A1C
oklch(30.2% 0.036 58.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #1D313F
These curated palettes and gradients contain exactly #1D313F. Open one to see the full color scheme around it.
Palettes
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.018
- Space Cadet #2B2D42 ΔE 0.025
- Midnight Green #073B4C ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.037
- Oxford Blue #1B263B ΔE 0.037
- Prussian Blue #1D3557 ΔE 0.043
- Dark #1B2431 ΔE 0.047
- Onyx #343A40 ΔE 0.048
Use #1D313F 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.