#31448E
Closest named color: Cobalt (#1E488F). oklch(41.3% 0.124 269.5), rgb(49, 68, 142).
Aa
White text reads best on this color (8.94:1).
About this color
#31448E is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.124 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.020 away. White text reads best on it, at 8.94:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #31448E |
| RGB | rgb(49, 68, 142) |
| HSL | hsl(228, 49%, 37%) |
| OKLCH | oklch(41.3% 0.124 269.5) |
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 #31448E | 8.94:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #31448E | 2.34:1 | Fails | Lc 13.8 | Not readable |
| #31448E text on white | 8.94:1 | AAA | Lc 90.2 | Preferred for body text |
| #31448E text on black | 2.34:1 | Fails | Lc -12.1 | 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 800.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#AEBFF1
oklch(80.9% 0.073 270.1)
-
Step 400
400
#849DE9
oklch(70.8% 0.115 269.4)
-
Step 500
500
#6682E3
oklch(63.1% 0.149 269.6)
-
Step 600
600
#4E6AD1
oklch(55.7% 0.162 269.2)
-
Step 700
700
#4057B5
oklch(49.1% 0.151 269.7)
-
Step 800
800 (this color)
#31448E
oklch(41.3% 0.124 269.5)
-
Step 900
900
#2D3D75
oklch(37.7% 0.098 269.3)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#31448E 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) | #1A4E91 | 0.031 |
| Deuteranopia (no green cones) | #00458C | 0.036 |
| Tritanopia (no blue cones) | #005562 | 0.105 |
| Achromatopsia (no color) | #494949 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31448E
#31448E
oklch(41.3% 0.124 269.5)
- #5D4800
#5D4800
oklch(41.2% 0.084 89.5)
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 #31448E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.020
- Blueberry #464196 ΔE 0.033
- Dark Slate Blue #483D8B ΔE 0.036
- Dusk Blue #26538D ΔE 0.042
- Light Navy #155084 ΔE 0.045
- Twilight Blue #0A437A ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.059
- Twilight #4E518B ΔE 0.059
Use #31448E 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.