#303997
Closest named color: Sapphire (#2138AB). oklch(39.8% 0.152 273.1), rgb(48, 57, 151).
Aa
White text reads best on this color (9.73:1).
About this color
#303997 is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.152 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.037 away. White text reads best on it, at 9.73:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.15:1 |
| White text | 9.73:1 |
Values
| HEX | #303997 |
| RGB | rgb(48, 57, 151) |
| HSL | hsl(235, 52%, 39%) |
| OKLCH | oklch(39.8% 0.152 273.1) |
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 #303997 | 9.73:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #303997 | 2.15:1 | Fails | Lc 11.9 | Not readable |
| #303997 text on white | 9.73:1 | AAA | Lc 92.1 | Preferred for body text |
| #303997 text on black | 2.15:1 | Fails | Lc -10.3 | 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 900.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#ACBDFF
oklch(80.9% 0.095 273)
-
Step 400
400
#8297FF
oklch(70.6% 0.154 273.2)
-
Step 500
500
#6579FF
oklch(63.1% 0.198 273)
-
Step 600
600
#4D55FF
oklch(55.5% 0.246 273)
-
Step 700
700
#3F41E2
oklch(49.1% 0.235 273)
-
Step 800
800
#3337B7
oklch(42.6% 0.196 273)
-
Step 900
900 (this color)
#303997
oklch(39.8% 0.152 273.1)
-
Step 950
950
#191F54
oklch(27% 0.096 273.3)
#303997 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) | #00499A | 0.048 |
| Deuteranopia (no green cones) | #003F95 | 0.038 |
| Tritanopia (no blue cones) | #005162 | 0.126 |
| Achromatopsia (no color) | #444444 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #303997
#303997
oklch(39.8% 0.152 273.1)
- #564500
#564500
oklch(39.7% 0.081 92.8)
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 #303997, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.037
- Blueberry #464196 ΔE 0.041
- Cobalt #1E488F ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.044
- Twilight Blue #0A437A ΔE 0.065
- Indigo Blue #3A18B1 ΔE 0.067
- Dusk Blue #26538D ΔE 0.073
- Light Navy #155084 ΔE 0.074
Use #303997 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.