#1F2651
Closest named color: Marine (#042E60). oklch(28.8% 0.078 273.5), rgb(31, 38, 81).
Aa
White text reads best on this color (14.43:1).
About this color
#1F2651 is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.078 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.039 away. White text reads best on it, at 14.43:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.45:1 |
| White text | 14.43:1 |
Values
| HEX | #1F2651 |
| RGB | rgb(31, 38, 81) |
| HSL | hsl(232, 45%, 22%) |
| OKLCH | oklch(28.8% 0.078 273.5) |
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 #1F2651 | 14.43:1 | AAA | Lc -104.0 | Preferred for body text |
| Black text on #1F2651 | 1.45:1 | Fails | Lc 0.0 | Not readable |
| #1F2651 text on white | 14.43:1 | AAA | Lc 101.1 | Preferred for body text |
| #1F2651 text on black | 1.45:1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FC
oklch(88.6% 0.051 273.1)
-
Step 300
300
#ADBDFD
oklch(80.9% 0.092 273.3)
-
Step 400
400
#8498FC
oklch(70.8% 0.148 273.5)
-
Step 500
500
#687AFA
oklch(63.1% 0.19 273.7)
-
Step 600
600
#525FE9
oklch(55.6% 0.206 273.5)
-
Step 700
700
#434DCB
oklch(49.1% 0.192 273.4)
-
Step 800
800
#3740A4
oklch(42.7% 0.159 273.6)
-
Step 900
900
#2F3882
oklch(37.8% 0.124 273.7)
-
Step 950
950 (this color)
#1F2651
oklch(28.8% 0.078 273.5)
#1F2651 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) | #112C53 | 0.023 |
| Deuteranopia (no green cones) | #0A2850 | 0.024 |
| Tritanopia (no blue cones) | #033037 | 0.071 |
| Achromatopsia (no color) | #2A2A2A | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2651
#1F2651
oklch(28.8% 0.078 273.5)
- #352A00
#352A00
oklch(28.9% 0.059 93.5)
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 #1F2651, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.039
- Oxford Blue #1B263B ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.046
- Gunmetal #293241 ΔE 0.057
- Dark #1B2431 ΔE 0.060
- Midnight Blue #191970 ΔE 0.065
- Marine Blue #01386A ΔE 0.066
Use #1F2651 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.