#1D4E5B
Closest named color: Deep Teal (#00555A). oklch(39.7% 0.056 218.2), rgb(29, 78, 91).
Aa
White text reads best on this color (9.15:1).
About this color
#1D4E5B is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.056 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.026 away. White text reads best on it, at 9.15:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.29:1 |
| White text | 9.15:1 |
Values
| HEX | #1D4E5B |
| RGB | rgb(29, 78, 91) |
| HSL | hsl(193, 52%, 24%) |
| OKLCH | oklch(39.7% 0.056 218.2) |
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 #1D4E5B | 9.15:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #1D4E5B | 2.29:1 | Fails | Lc 13.1 | Not readable |
| #1D4E5B text on white | 9.15:1 | AAA | Lc 90.9 | Preferred for body text |
| #1D4E5B text on black | 2.29:1 | Fails | Lc -11.4 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C9DDE4
oklch(88.5% 0.023 220.8)
-
Step 300
300
#A3C8D3
oklch(81% 0.042 217.8)
-
Step 400
400
#6FABBD
oklch(70.7% 0.067 218.8)
-
Step 500
500
#4396AC
oklch(63.1% 0.086 217.9)
-
Step 600
600
#198098
oklch(55.6% 0.094 218.4)
-
Step 700
700
#056C82
oklch(49.1% 0.087 218.7)
-
Step 800
800
#0E5869
oklch(42.7% 0.072 218.1)
-
Step 900
900 (this color)
#1D4E5B
oklch(39.7% 0.056 218.2)
-
Step 950
950
#0F2B32
oklch(27.1% 0.036 216.6)
#1D4E5B 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) | #464C5C | 0.049 |
| Deuteranopia (no green cones) | #3D455B | 0.044 |
| Tritanopia (no blue cones) | #005252 | 0.028 |
| Achromatopsia (no color) | #484848 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4E5B
#1D4E5B
oklch(39.7% 0.056 218.2)
- #613C30
#613C30
oklch(39.7% 0.056 38.7)
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 #1D4E5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.026
- Charcoal #264653 ΔE 0.026
- Dark Slate Gray #2F4F4F ΔE 0.027
- Dark Grey Blue #29465B ΔE 0.027
- Dark Teal #014D4E ΔE 0.029
- Dark Blue Green #005249 ΔE 0.041
- Petrol #005F6A ΔE 0.053
- Charcoal Grey #3C4142 ΔE 0.056
Use #1D4E5B 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.