#1B4E67
Closest named color: Dark Grey Blue (#29465B). oklch(40.2% 0.068 233.5), rgb(27, 78, 103).
Aa
White text reads best on this color (9.00:1).
About this color
#1B4E67 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.068 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.029 away. White text reads best on it, at 9.00:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #1B4E67 |
| RGB | rgb(27, 78, 103) |
| HSL | hsl(200, 58%, 25%) |
| OKLCH | oklch(40.2% 0.068 233.5) |
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 #1B4E67 | 9.00:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #1B4E67 | 2.33:1 | Fails | Lc 13.5 | Not readable |
| #1B4E67 text on white | 9.00:1 | AAA | Lc 90.4 | Preferred for body text |
| #1B4E67 text on black | 2.33:1 | Fails | Lc -11.9 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE9
oklch(88.6% 0.028 232.7)
-
Step 300
300
#A1C7DD
oklch(80.9% 0.051 233.6)
-
Step 400
400
#6BA9CC
oklch(70.6% 0.082 234.4)
-
Step 500
500
#3D94BE
oklch(63.2% 0.104 232.8)
-
Step 600
600
#0A7DAB
oklch(55.6% 0.114 233.7)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#045677
oklch(42.7% 0.087 233.6)
-
Step 900
900 (this color)
#1B4E67
oklch(40.2% 0.068 233.5)
-
Step 950
950
#0D2A38
oklch(27% 0.043 232.5)
#1B4E67 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) | #424D68 | 0.044 |
| Deuteranopia (no green cones) | #374667 | 0.036 |
| Tritanopia (no blue cones) | #005556 | 0.044 |
| Achromatopsia (no color) | #494949 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4E67
#1B4E67
oklch(40.2% 0.068 233.5)
- #653D23
#653D23
oklch(40.2% 0.068 52.6)
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 #1B4E67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.029
- Charcoal #264653 ΔE 0.037
- Deep Teal #00555A ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.045
- Dark Teal #014D4E ΔE 0.047
- Light Navy #155084 ΔE 0.048
- Petrol #005F6A ΔE 0.053
Use #1B4E67 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.