#1F3995
Closest named color: Sapphire (#2138AB). oklch(38.7% 0.154 266.7), rgb(31, 57, 149).
Aa
White text reads best on this color (10.10:1).
About this color
#1F3995 is a dark, vivid blue. In OKLCH its lightness is 39%, its chroma 0.154 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.036 away. White text reads best on it, at 10.10:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.07:1 |
| White text | 10.10:1 |
Values
| HEX | #1F3995 |
| RGB | rgb(31, 57, 149) |
| HSL | hsl(227, 66%, 35%) |
| OKLCH | oklch(38.7% 0.154 266.7) |
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 #1F3995 | 10.10:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #1F3995 | 2.07:1 | Fails | Lc 11.1 | Not readable |
| #1F3995 text on white | 10.10:1 | AAA | Lc 92.9 | Preferred for body text |
| #1F3995 text on black | 2.07:1 | Fails | Lc -9.6 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#759BFF
oklch(70.6% 0.153 266.8)
-
Step 500
500
#537EFF
oklch(63.1% 0.197 266.8)
-
Step 600
600
#345CFF
oklch(55.5% 0.245 266.9)
-
Step 700
700
#2647E5
oklch(49.1% 0.239 266.8)
-
Step 800
800
#1F3CB9
oklch(42.7% 0.198 266.7)
-
Step 900
900 (this color)
#1F3995
oklch(38.7% 0.154 266.7)
-
Step 950
950
#112155
oklch(27% 0.097 266.8)
#1F3995 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) | #004798 | 0.036 |
| Deuteranopia (no green cones) | #003C93 | 0.019 |
| Tritanopia (no blue cones) | #005161 | 0.122 |
| Achromatopsia (no color) | #424242 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F3995
#1F3995
oklch(38.7% 0.154 266.7)
- #574100
#574100
oklch(38.9% 0.079 86.8)
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 #1F3995, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.036
- Cobalt #1E488F ΔE 0.041
- Twilight Blue #0A437A ΔE 0.056
- Blueberry #464196 ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.061
- Light Navy #155084 ΔE 0.072
- Indigo Blue #3A18B1 ΔE 0.073
- Royal #0C1793 ΔE 0.075
Use #1F3995 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.