#312E98
Closest named color: Sapphire (#2138AB). oklch(38% 0.167 276.2), rgb(49, 46, 152).
Aa
White text reads best on this color (10.63:1).
About this color
#312E98 is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.167 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.041 away. White text reads best on it, at 10.63:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 1.97:1 |
| White text | 10.63:1 |
Values
| HEX | #312E98 |
| RGB | rgb(49, 46, 152) |
| HSL | hsl(242, 54%, 39%) |
| OKLCH | oklch(38% 0.167 276.2) |
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 #312E98 | 10.63:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #312E98 | 1.97:1 | Fails | Lc 9.9 | Not readable |
| #312E98 text on white | 10.63:1 | AAA | Lc 94.0 | Preferred for body text |
| #312E98 text on black | 1.97:1 | Fails | Lc -8.6 | 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 900.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FF
oklch(93.7% 0.03 275.6)
-
Step 200
200
#CFD7FF
oklch(88.6% 0.056 276.3)
-
Step 300
300
#B0BCFF
oklch(81% 0.096 276.2)
-
Step 400
400
#8895FF
oklch(70.6% 0.155 276.4)
-
Step 500
500
#6D76FF
oklch(63% 0.2 276.2)
-
Step 600
600
#5751FF
oklch(55.5% 0.248 276.2)
-
Step 700
700
#4933EE
oklch(49.1% 0.259 276.3)
-
Step 800
800
#3B2EC0
oklch(42.8% 0.214 276.3)
-
Step 900
900 (this color)
#312E98
oklch(38% 0.167 276.2)
-
Step 950
950
#1B1C58
oklch(26.9% 0.105 275.9)
#312E98 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) | #00439B | 0.056 |
| Deuteranopia (no green cones) | #003A96 | 0.045 |
| Tritanopia (no blue cones) | #004A5F | 0.134 |
| Achromatopsia (no color) | #3E3E3E | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312E98
#312E98
oklch(38% 0.167 276.2)
- #4F4200
#4F4200
oklch(38.1% 0.078 96.4)
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 #312E98, closest first.
No curated palette has a color within ΔE 0.04 of #312E98.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.041
- Indigo Blue #3A18B1 ΔE 0.050
- Imperial Purple #480CA8 ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.059
- Blueberry #464196 ΔE 0.059
- Cobalt #1E488F ΔE 0.066
- Royal #0C1793 ΔE 0.070
- Ultramarine #2000B1 ΔE 0.072
Use #312E98 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.