#1F2A5E
Closest named color: Marine (#042E60). oklch(30.7% 0.093 271), rgb(31, 42, 94).
Aa
White text reads best on this color (13.53:1).
About this color
#1F2A5E is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.093 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.026 away. White text reads best on it, at 13.53:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.55:1 |
| White text | 13.53:1 |
Values
| HEX | #1F2A5E |
| RGB | rgb(31, 42, 94) |
| HSL | hsl(230, 50%, 25%) |
| OKLCH | oklch(30.7% 0.093 271) |
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 #1F2A5E | 13.53:1 | AAA | Lc -103.0 | Preferred for body text |
| Black text on #1F2A5E | 1.55:1 | Fails | Lc 0.0 | Not readable |
| #1F2A5E text on white | 13.53:1 | AAA | Lc 99.8 | Preferred for body text |
| #1F2A5E text on black | 1.55:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#AABEFF
oklch(81% 0.095 271)
-
Step 400
400
#7E99FF
oklch(70.7% 0.152 270.9)
-
Step 500
500
#607BFF
oklch(63.2% 0.197 271)
-
Step 600
600
#4658FF
oklch(55.6% 0.245 271)
-
Step 700
700
#3946DF
oklch(49.2% 0.228 271)
-
Step 800
800
#2E3BB4
oklch(42.7% 0.189 270.9)
-
Step 900
900
#28358E
oklch(37.8% 0.147 271.1)
-
Step 950
950 (this color)
#1F2A5E
oklch(30.7% 0.093 271)
#1F2A5E 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) | #0C3160 | 0.025 |
| Deuteranopia (no green cones) | #002C5D | 0.028 |
| Tritanopia (no blue cones) | #00363F | 0.080 |
| Achromatopsia (no color) | #2E2E2E | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2A5E
#1F2A5E
oklch(30.7% 0.093 271)
- #3B2E00
#3B2E00
oklch(30.7% 0.063 91.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #1F2A5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.026
- Prussian Blue #1D3557 ΔE 0.038
- Marine Blue #01386A ΔE 0.046
- Midnight Blue #191970 ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.056
- Oxford Blue #1B263B ΔE 0.064
- Gunmetal #293241 ΔE 0.065
- Dark Blue Grey #1F3B4D ΔE 0.067
Use #1F2A5E 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.