#1B415F
Closest named color: Dark Grey Blue (#29465B). oklch(36.3% 0.068 245.1), rgb(27, 65, 95).
Aa
White text reads best on this color (10.67:1).
About this color
#1B415F is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.068 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 10.67:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.96:1 |
| White text | 10.67:1 |
Values
| HEX | #1B415F |
| RGB | rgb(27, 65, 95) |
| HSL | hsl(206, 56%, 24%) |
| OKLCH | oklch(36.3% 0.068 245.1) |
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 #1B415F | 10.67:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #1B415F | 1.96:1 | Fails | Lc 9.4 | Not readable |
| #1B415F text on white | 10.67:1 | AAA | Lc 94.5 | Preferred for body text |
| #1B415F 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A6C5E0
oklch(81% 0.051 244.8)
-
Step 400
400
#75A6D0
oklch(70.6% 0.081 245.2)
-
Step 500
500
#4F8FC4
oklch(63% 0.104 245.5)
-
Step 600
600
#3079B1
oklch(55.7% 0.113 245.2)
-
Step 700
700
#226598
oklch(49% 0.105 245.6)
-
Step 800
800
#1E537B
oklch(42.7% 0.087 244.9)
-
Step 900
900 (this color)
#1B415F
oklch(36.3% 0.068 245.1)
-
Step 950
950
#13283A
oklch(26.9% 0.043 246.2)
#1B415F 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) | #344260 | 0.030 |
| Deuteranopia (no green cones) | #2A3B5E | 0.023 |
| Tritanopia (no blue cones) | #00484C | 0.049 |
| Achromatopsia (no color) | #3E3E3E | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B415F
#1B415F
oklch(36.3% 0.068 245.1)
- #563612
#563612
oklch(36.4% 0.067 65.6)
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 #1B415F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Charcoal #264653 ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.038
- Midnight Green #073B4C ΔE 0.041
- Marine Blue #01386A ΔE 0.043
- Twilight Blue #0A437A ΔE 0.046
- Onyx #343A40 ΔE 0.057
Use #1B415F 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.