#1F3E6D
Closest named color: Twilight Blue (#0A437A). oklch(36.6% 0.089 258.6), rgb(31, 62, 109).
Aa
White text reads best on this color (10.66:1).
About this color
#1F3E6D is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.089 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.026 away. White text reads best on it, at 10.66:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.96:1 |
| White text | 10.66:1 |
Values
| HEX | #1F3E6D |
| RGB | rgb(31, 62, 109) |
| HSL | hsl(216, 56%, 27%) |
| OKLCH | oklch(36.6% 0.089 258.6) |
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 #1F3E6D | 10.66:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #1F3E6D | 1.96:1 | Fails | Lc 9.4 | Not readable |
| #1F3E6D text on white | 10.66:1 | AAA | Lc 94.5 | Preferred for body text |
| #1F3E6D text on black | 1.96:1 | Fails | Lc -8.1 | 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 900.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A7C2EC
oklch(80.8% 0.067 259.1)
-
Step 400
400
#77A2E3
oklch(70.7% 0.107 258.4)
-
Step 500
500
#5389DB
oklch(63.1% 0.137 258.5)
-
Step 600
600
#3771C9
oklch(55.6% 0.15 258.7)
-
Step 700
700
#2A5EAE
oklch(49.1% 0.139 258.9)
-
Step 800
800
#244D8D
oklch(42.6% 0.116 259.1)
-
Step 900
900 (this color)
#1F3E6D
oklch(36.6% 0.089 258.6)
-
Step 950
950
#142642
oklch(26.9% 0.058 258.9)
#1F3E6D 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) | #28426F | 0.017 |
| Deuteranopia (no green cones) | #1C3B6C | 0.010 |
| Tritanopia (no blue cones) | #004950 | 0.072 |
| Achromatopsia (no color) | #3E3E3E | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F3E6D
#1F3E6D
oklch(36.6% 0.089 258.6)
- #543900
#543900
oklch(36.6% 0.076 78.9)
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 #1F3E6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.026
- Marine Blue #01386A ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.056
- Charcoal #264653 ΔE 0.058
- Marine #042E60 ΔE 0.060
- Light Navy #155084 ΔE 0.060
Use #1F3E6D 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.