#31458D
Closest named color: Cobalt (#1E488F). oklch(41.5% 0.122 268.9), rgb(49, 69, 141).
Aa
White text reads best on this color (8.87:1).
About this color
#31458D is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.122 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.019 away. White text reads best on it, at 8.87:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.36:1 |
| White text | 8.87:1 |
Values
| HEX | #31458D |
| RGB | rgb(49, 69, 141) |
| HSL | hsl(227, 48%, 37%) |
| OKLCH | oklch(41.5% 0.122 268.9) |
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 #31458D | 8.87:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #31458D | 2.36:1 | Fails | Lc 13.9 | Not readable |
| #31458D text on white | 8.87:1 | AAA | Lc 90.0 | Preferred for body text |
| #31458D text on black | 2.36:1 | Fails | Lc -12.2 | 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
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#AEBFF0
oklch(80.9% 0.072 269.8)
-
Step 400
400
#839DE8
oklch(70.7% 0.114 268.8)
-
Step 500
500
#6683E1
oklch(63.2% 0.145 269)
-
Step 600
600
#4E6ACF
oklch(55.6% 0.159 269.1)
-
Step 700
700
#3F58B3
oklch(49.1% 0.147 268.9)
-
Step 800
800 (this color)
#31458D
oklch(41.5% 0.122 268.9)
-
Step 900
900
#2D3D74
oklch(37.6% 0.096 269.2)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#31458D 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) | #1E4E90 | 0.028 |
| Deuteranopia (no green cones) | #06468C | 0.033 |
| Tritanopia (no blue cones) | #005662 | 0.103 |
| Achromatopsia (no color) | #4A4A4A | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31458D
#31458D
oklch(41.5% 0.122 268.9)
- #5E4800
#5E4800
oklch(41.3% 0.084 88.6)
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 #31458D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.019
- Blueberry #464196 ΔE 0.034
- Dark Slate Blue #483D8B ΔE 0.037
- Dusk Blue #26538D ΔE 0.040
- Light Navy #155084 ΔE 0.042
- Twilight Blue #0A437A ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.056
- Twilight #4E518B ΔE 0.057
Use #31458D 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.