#1B4668
Closest named color: Dark Grey Blue (#29465B). oklch(38.1% 0.075 245.5), rgb(27, 70, 104).
Aa
White text reads best on this color (9.89:1).
About this color
#1B4668 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.075 and its hue 246°. 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 9.89:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.12:1 |
| White text | 9.89:1 |
Values
| HEX | #1B4668 |
| RGB | rgb(27, 70, 104) |
| HSL | hsl(206, 59%, 26%) |
| OKLCH | oklch(38.1% 0.075 245.5) |
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 #1B4668 | 9.89:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #1B4668 | 2.12:1 | Fails | Lc 11.2 | Not readable |
| #1B4668 text on white | 9.89:1 | AAA | Lc 92.7 | Preferred for body text |
| #1B4668 text on black | 2.12:1 | Fails | Lc -9.7 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A3C5E3
oklch(80.9% 0.056 245.2)
-
Step 400
400
#70A6D6
oklch(70.6% 0.091 246.3)
-
Step 500
500
#4790CA
oklch(63.2% 0.114 245)
-
Step 600
600
#2379B7
oklch(55.7% 0.124 245.2)
-
Step 700
700
#14659E
oklch(49.1% 0.117 245.8)
-
Step 800
800
#155380
oklch(42.8% 0.096 245.4)
-
Step 900
900 (this color)
#1B4668
oklch(38.1% 0.075 245.5)
-
Step 950
950
#10283C
oklch(26.8% 0.048 246)
#1B4668 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) | #374769 | 0.032 |
| Deuteranopia (no green cones) | #2C4067 | 0.023 |
| Tritanopia (no blue cones) | #004E52 | 0.054 |
| Achromatopsia (no color) | #434343 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4668
#1B4668
oklch(38.1% 0.075 245.5)
- #5E390F
#5E390F
oklch(38.1% 0.076 64.6)
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 #1B4668, 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
- Twilight Blue #0A437A ΔE 0.035
- Charcoal #264653 ΔE 0.037
- Marine Blue #01386A ΔE 0.051
- Light Navy #155084 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.056
Use #1B4668 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.