#1F3254
Closest named color: Prussian Blue (#1D3557). oklch(31.9% 0.066 261.3), rgb(31, 50, 84).
Aa
White text reads best on this color (12.78:1).
About this color
#1F3254 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.066 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.010 away. White text reads best on it, at 12.78:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.64:1 |
| White text | 12.78:1 |
Values
| HEX | #1F3254 |
| RGB | rgb(31, 50, 84) |
| HSL | hsl(218, 46%, 23%) |
| OKLCH | oklch(31.9% 0.066 261.3) |
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 #1F3254 | 12.78:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #1F3254 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #1F3254 text on white | 12.78:1 | AAA | Lc 98.8 | Preferred for body text |
| #1F3254 text on black | 1.64:1 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#C9DAF7
oklch(88.5% 0.044 261.2)
-
Step 300
300
#A5C2F4
oklch(81% 0.078 261.2)
-
Step 400
400
#74A0EE
oklch(70.7% 0.125 261.3)
-
Step 500
500
#5086E9
oklch(63.1% 0.16 261.4)
-
Step 600
600
#346DD7
oklch(55.5% 0.174 261.4)
-
Step 700
700
#275BBA
oklch(49.2% 0.16 261.2)
-
Step 800
800
#214B97
oklch(42.8% 0.133 261.1)
-
Step 900
900
#203F78
oklch(37.7% 0.104 261.4)
-
Step 950
950 (this color)
#1F3254
oklch(31.9% 0.066 261.3)
#1F3254 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) | #243555 | 0.012 |
| Deuteranopia (no green cones) | #1D3053 | 0.007 |
| Tritanopia (no blue cones) | #003A3F | 0.058 |
| Achromatopsia (no color) | #323232 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F3254
#1F3254
oklch(31.9% 0.066 261.3)
- #432E00
#432E00
oklch(31.8% 0.066 81.2)
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 #1F3254, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.010
- Dark Blue Grey #1F3B4D ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.035
- Marine #042E60 ΔE 0.036
- Gunmetal #293241 ΔE 0.036
- Midnight Green #073B4C ΔE 0.040
- Marine Blue #01386A ΔE 0.043
- Oxford Blue #1B263B ΔE 0.055
Use #1F3254 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.