#1F3147
Closest named color: Gunmetal (#293241). oklch(30.9% 0.046 254), rgb(31, 49, 71).
Aa
White text reads best on this color (13.21:1).
About this color
#1F3147 is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.046 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.019 away. White text reads best on it, at 13.21:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.58:1 |
| White text | 13.21:1 |
Values
| HEX | #1F3147 |
| RGB | rgb(31, 49, 71) |
| HSL | hsl(213, 39%, 20%) |
| OKLCH | oklch(30.9% 0.046 254) |
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 #1F3147 | 13.21:1 | AAA | Lc -102.7 | Preferred for body text |
| Black text on #1F3147 | 1.58:1 | Fails | Lc 0.0 | Not readable |
| #1F3147 text on white | 13.21:1 | AAA | Lc 99.5 | Preferred for body text |
| #1F3147 text on black | 1.58:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDBED
oklch(88.6% 0.03 253)
-
Step 300
300
#A9C3E4
oklch(80.9% 0.055 254.5)
-
Step 400
400
#7AA4D7
oklch(70.8% 0.088 253.7)
-
Step 500
500
#578CCC
oklch(63.1% 0.113 254)
-
Step 600
600
#3B75B9
oklch(55.6% 0.122 253.9)
-
Step 700
700
#2D629F
oklch(49.1% 0.113 253.8)
-
Step 800
800
#275081
oklch(42.7% 0.094 254.3)
-
Step 900
900
#244368
oklch(37.8% 0.074 253.9)
-
Step 950
950 (this color)
#1F3147
oklch(30.9% 0.046 254)
#1F3147 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) | #283248 | 0.014 |
| Deuteranopia (no green cones) | #232E47 | 0.011 |
| Tritanopia (no blue cones) | #0C3639 | 0.040 |
| Achromatopsia (no color) | #303030 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F3147
#1F3147
oklch(30.9% 0.046 254)
- #3E2C13
#3E2C13
oklch(30.8% 0.047 73.6)
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 #1F3147, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.019
- Space Cadet #2B2D42 ΔE 0.021
- Prussian Blue #1D3557 ΔE 0.029
- Dark Blue Grey #1F3B4D ΔE 0.033
- Midnight Green #073B4C ΔE 0.035
- Oxford Blue #1B263B ΔE 0.040
- Onyx #343A40 ΔE 0.049
- Marine #042E60 ΔE 0.053
Use #1F3147 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.