#1D455E
Closest named color: Dark Grey Blue (#29465B). oklch(37.4% 0.062 238.9), rgb(29, 69, 94).
Aa
White text reads best on this color (10.16:1).
About this color
#1D455E is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.062 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.014 away. White text reads best on it, at 10.16:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.06:1 |
| White text | 10.16:1 |
Values
| HEX | #1D455E |
| RGB | rgb(29, 69, 94) |
| HSL | hsl(203, 53%, 24%) |
| OKLCH | oklch(37.4% 0.062 238.9) |
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 #1D455E | 10.16:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #1D455E | 2.06:1 | Fails | Lc 10.5 | Not readable |
| #1D455E text on white | 10.16:1 | AAA | Lc 93.4 | Preferred for body text |
| #1D455E text on black | 2.06:1 | Fails | Lc -9.1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCE9
oklch(88.5% 0.026 239.1)
-
Step 300
300
#A6C5DC
oklch(80.8% 0.047 240.3)
-
Step 400
400
#74A8CA
oklch(70.8% 0.074 237.9)
-
Step 500
500
#4D91BD
oklch(63% 0.096 239.1)
-
Step 600
600
#2D7BA9
oklch(55.6% 0.103 238.7)
-
Step 700
700
#1F6791
oklch(49% 0.096 239.3)
-
Step 800
800
#1C5476
oklch(42.6% 0.08 239.6)
-
Step 900
900 (this color)
#1D455E
oklch(37.4% 0.062 238.9)
-
Step 950
950
#132938
oklch(27% 0.04 240.2)
#1D455E 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) | #39455F | 0.034 |
| Deuteranopia (no green cones) | #313E5E | 0.030 |
| Tritanopia (no blue cones) | #004B4E | 0.043 |
| Achromatopsia (no color) | #414141 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D455E
#1D455E
oklch(37.4% 0.062 238.9)
- #59381D
#59381D
oklch(37.4% 0.062 58.5)
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 #1D455E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.014
- Charcoal #264653 ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.038
- Dark Teal #014D4E ΔE 0.047
- Midnight Green #073B4C ΔE 0.047
- Twilight Blue #0A437A ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.051
- Dark Slate Gray #2F4F4F ΔE 0.052
Use #1D455E 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.