#31458E
Closest named color: Cobalt (#1E488F). oklch(41.6% 0.123 269), rgb(49, 69, 142).
Aa
White text reads best on this color (8.85:1).
About this color
#31458E is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.123 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 8.85:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.37:1 |
| White text | 8.85:1 |
Values
| HEX | #31458E |
| RGB | rgb(49, 69, 142) |
| HSL | hsl(227, 49%, 37%) |
| OKLCH | oklch(41.6% 0.123 269) |
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 #31458E | 8.85:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #31458E | 2.37:1 | Fails | Lc 14.0 | Not readable |
| #31458E text on white | 8.85:1 | AAA | Lc 90.0 | Fine for body text |
| #31458E text on black | 2.37:1 | Fails | Lc -12.3 | 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
#ADBFF0
oklch(80.8% 0.072 269)
-
Step 400
400
#839DE9
oklch(70.7% 0.116 268.9)
-
Step 500
500
#6583E2
oklch(63.2% 0.147 268.7)
-
Step 600
600
#4E6AD0
oklch(55.6% 0.16 269.1)
-
Step 700
700
#3F58B4
oklch(49.2% 0.149 268.9)
-
Step 800
800 (this color)
#31458E
oklch(41.6% 0.123 269)
-
Step 900
900
#2D3D74
oklch(37.6% 0.096 269.2)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#31458E 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) | #1C4E91 | 0.029 |
| Deuteranopia (no green cones) | #03468C | 0.035 |
| Tritanopia (no blue cones) | #005663 | 0.103 |
| Achromatopsia (no color) | #4A4A4A | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31458E
#31458E
oklch(41.6% 0.123 269)
- #5E4900
#5E4900
oklch(41.6% 0.085 89.8)
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 #31458E, 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 0.043
- Twilight Blue #0A437A ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.057
- Twilight #4E518B ΔE 0.057
Use #31458E 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.