#1F314F
Closest named color: Prussian Blue (#1D3557). oklch(31.3% 0.059 260.2), rgb(31, 49, 79).
Aa
White text reads best on this color (13.03:1).
About this color
#1F314F is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.059 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.017 away. White text reads best on it, at 13.03:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.61:1 |
| White text | 13.03:1 |
Values
| HEX | #1F314F |
| RGB | rgb(31, 49, 79) |
| HSL | hsl(218, 44%, 22%) |
| OKLCH | oklch(31.3% 0.059 260.2) |
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 #1F314F | 13.03:1 | AAA | Lc -102.5 | Preferred for body text |
| Black text on #1F314F | 1.61:1 | Fails | Lc 0.0 | Not readable |
| #1F314F text on white | 13.03:1 | AAA | Lc 99.2 | Preferred for body text |
| #1F314F text on black | 1.61:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CBDAF4
oklch(88.5% 0.039 261.5)
-
Step 300
300
#A7C2EF
oklch(81% 0.07 260.6)
-
Step 400
400
#77A1E6
oklch(70.7% 0.112 260)
-
Step 500
500
#5488DF
oklch(63.1% 0.143 260.1)
-
Step 600
600
#3970CD
oklch(55.7% 0.156 260.2)
-
Step 700
700
#2B5DB1
oklch(49.1% 0.144 260.2)
-
Step 800
800
#254C8F
oklch(42.6% 0.12 260.4)
-
Step 900
900
#224072
oklch(37.6% 0.093 260)
-
Step 950
950 (this color)
#1F314F
oklch(31.3% 0.059 260.2)
#1F314F 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) | #253350 | 0.011 |
| Deuteranopia (no green cones) | #1F2F4E | 0.006 |
| Tritanopia (no blue cones) | #03383C | 0.053 |
| Achromatopsia (no color) | #313131 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F314F
#1F314F
oklch(31.3% 0.059 260.2)
- #412D06
#412D06
oklch(31.3% 0.06 79.4)
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 #1F314F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.017
- Space Cadet #2B2D42 ΔE 0.028
- Gunmetal #293241 ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.035
- Midnight Green #073B4C ΔE 0.038
- Marine #042E60 ΔE 0.041
- Oxford Blue #1B263B ΔE 0.047
- Marine Blue #01386A ΔE 0.051
Use #1F314F 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.