#1F3EA0
Closest named color: Sapphire (#2138AB). oklch(40.7% 0.163 265.8), rgb(31, 62, 160).
Aa
White text reads best on this color (9.31:1).
About this color
#1F3EA0 is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.163 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.022 away. White text reads best on it, at 9.31:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #1F3EA0 |
| RGB | rgb(31, 62, 160) |
| HSL | hsl(226, 68%, 37%) |
| OKLCH | oklch(40.7% 0.163 265.8) |
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 #1F3EA0 | 9.31:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #1F3EA0 | 2.25:1 | Fails | Lc 13.1 | Not readable |
| #1F3EA0 text on white | 9.31:1 | AAA | Lc 90.9 | Preferred for body text |
| #1F3EA0 text on black | 2.25:1 | Fails | Lc -11.4 | 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
#F1F5FE
oklch(97% 0.013 266.7)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FD
oklch(88.5% 0.053 266.4)
-
Step 300
300
#A4C0FF
oklch(81% 0.095 265.8)
-
Step 400
400
#739CFF
oklch(70.7% 0.152 265.7)
-
Step 500
500
#517FFE
oklch(63.1% 0.196 266)
-
Step 600
600
#3764ED
oklch(55.5% 0.212 265.8)
-
Step 700
700
#2B52CE
oklch(49.1% 0.197 265.9)
-
Step 800
800 (this color)
#1F3EA0
oklch(40.7% 0.163 265.8)
-
Step 900
900
#213B84
oklch(37.8% 0.127 265.8)
-
Step 950
950
#13234D
oklch(26.9% 0.08 265.6)
#1F3EA0 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) | #004DA3 | 0.038 |
| Deuteranopia (no green cones) | #00419E | 0.018 |
| Tritanopia (no blue cones) | #005769 | 0.126 |
| Achromatopsia (no color) | #474747 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F3EA0
#1F3EA0
oklch(40.7% 0.163 265.8)
- #5E4500
#5E4500
oklch(40.7% 0.083 84.9)
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 #1F3EA0, closest first.
No curated palette has a color within ΔE 0.04 of #1F3EA0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.022
- Cobalt #1E488F ΔE 0.039
- Blueberry #464196 ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.063
- Blue Blue #2242C7 ΔE 0.064
- Twilight Blue #0A437A ΔE 0.068
- Dusk Blue #26538D ΔE 0.069
- Light Navy #155084 ΔE 0.071
Use #1F3EA0 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.