#31489E
Closest named color: Cobalt (#1E488F). oklch(43.4% 0.142 268.6), rgb(49, 72, 158).
Aa
White text reads best on this color (8.23:1).
About this color
#31489E is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.142 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.032 away. White text reads best on it, at 8.23:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.55:1 |
| White text | 8.23:1 |
Values
| HEX | #31489E |
| RGB | rgb(49, 72, 158) |
| HSL | hsl(227, 53%, 41%) |
| OKLCH | oklch(43.4% 0.142 268.6) |
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 #31489E | 8.23:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #31489E | 2.55:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #31489E text on white | 8.23:1 | AAA | Lc 88.1 | Fine for body text |
| #31489E text on black | 2.55:1 | Fails | Lc -14.1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9F9
oklch(88.6% 0.046 267.9)
-
Step 300
300
#AABFF7
oklch(80.9% 0.083 268.6)
-
Step 400
400
#7E9CF4
oklch(70.8% 0.134 268.6)
-
Step 500
500
#5F80EF
oklch(63% 0.17 268.7)
-
Step 600
600
#4767DE
oklch(55.7% 0.185 268.4)
-
Step 700
700
#3955C1
oklch(49.2% 0.172 268.4)
-
Step 800
800 (this color)
#31489E
oklch(43.4% 0.142 268.6)
-
Step 900
900
#293C7C
oklch(37.8% 0.111 268.3)
-
Step 950
950
#182448
oklch(27.1% 0.069 267.8)
#31489E 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) | #0954A1 | 0.038 |
| Deuteranopia (no green cones) | #004A9C | 0.033 |
| Tritanopia (no blue cones) | #005D6C | 0.117 |
| Achromatopsia (no color) | #4F4F4F | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31489E
#31489E
oklch(43.4% 0.142 268.6)
- #654D00
#654D00
oklch(43.3% 0.089 87.9)
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 #31489E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.032
- Blueberry #464196 ΔE 0.033
- Dusk Blue #26538D ΔE 0.045
- Dark Slate Blue #483D8B ΔE 0.048
- Sapphire #2138AB ΔE 0.050
- Light Navy #155084 ΔE 0.056
- Twilight #4E518B ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.062
Use #31489E 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.