#1F2950
Closest named color: Space Cadet (#2B2D42). oklch(29.4% 0.072 270.6), rgb(31, 41, 80).
Aa
White text reads best on this color (14.08:1).
About this color
#1F2950 is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.072 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Space Cadet (#2B2D42), ΔE 0.037 away. White text reads best on it, at 14.08:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.49:1 |
| White text | 14.08:1 |
Values
| HEX | #1F2950 |
| RGB | rgb(31, 41, 80) |
| HSL | hsl(228, 44%, 22%) |
| OKLCH | oklch(29.4% 0.072 270.6) |
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 #1F2950 | 14.08:1 | AAA | Lc -103.6 | Preferred for body text |
| Black text on #1F2950 | 1.49:1 | Fails | Lc 0.0 | Not readable |
| #1F2950 text on white | 14.08:1 | AAA | Lc 100.6 | Preferred for body text |
| #1F2950 text on black | 1.49:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ACBEF9
oklch(80.9% 0.086 271.2)
-
Step 400
400
#819BF6
oklch(70.8% 0.137 270.5)
-
Step 500
500
#637EF2
oklch(63% 0.176 270.8)
-
Step 600
600
#4C64E0
oklch(55.5% 0.19 270.7)
-
Step 700
700
#3E52C3
oklch(49.1% 0.177 270.8)
-
Step 800
800
#33449E
oklch(42.7% 0.147 270.8)
-
Step 900
900
#2C3B7D
oklch(37.8% 0.113 270.5)
-
Step 950
950 (this color)
#1F2950
oklch(29.4% 0.072 270.6)
#1F2950 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) | #182E51 | 0.017 |
| Deuteranopia (no green cones) | #12294F | 0.017 |
| Tritanopia (no blue cones) | #043238 | 0.065 |
| Achromatopsia (no color) | #2B2B2B | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2950
#1F2950
oklch(29.4% 0.072 270.6)
- #382B00
#382B00
oklch(29.5% 0.06 90.9)
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 #1F2950, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.037
- Marine #042E60 ΔE 0.037
- Prussian Blue #1D3557 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.040
- Gunmetal #293241 ΔE 0.048
- Dark #1B2431 ΔE 0.058
- Marine Blue #01386A ΔE 0.061
- Dark Blue Grey #1F3B4D ΔE 0.061
Use #1F2950 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.