#1D3F45
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.5% 0.041 210.4), rgb(29, 63, 69).
Aa
White text reads best on this color (11.35:1).
About this color
#1D3F45 is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.041 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.023 away. White text reads best on it, at 11.35:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.84:1 |
| White text | 11.35:1 |
Values
| HEX | #1D3F45 |
| RGB | rgb(29, 63, 69) |
| HSL | hsl(189, 41%, 19%) |
| OKLCH | oklch(34.5% 0.041 210.4) |
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 #1D3F45 | 11.35:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #1D3F45 | 1.84:1 | Fails | Lc 7.8 | Not readable |
| #1D3F45 text on white | 11.35:1 | AAA | Lc 96.1 | Preferred for body text |
| #1D3F45 text on black | 1.84:1 | Fails | Lc 0.0 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CDDCDF
oklch(88.4% 0.017 211)
-
Step 300
300
#ABC6CC
oklch(80.8% 0.03 212.6)
-
Step 400
400
#7DA9B2
oklch(70.6% 0.049 211.6)
-
Step 500
500
#5A949F
oklch(63.1% 0.063 211)
-
Step 600
600
#3E7E8A
oklch(55.6% 0.068 211.4)
-
Step 700
700
#2F6A75
oklch(49% 0.063 211.5)
-
Step 800
800
#28575F
oklch(42.7% 0.053 210)
-
Step 900
900 (this color)
#1D3F45
oklch(34.5% 0.041 210.4)
-
Step 950
950
#172A2D
oklch(27% 0.025 208.4)
#1D3F45 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) | #3A3D45 | 0.039 |
| Deuteranopia (no green cones) | #343845 | 0.036 |
| Tritanopia (no blue cones) | #034241 | 0.022 |
| Achromatopsia (no color) | #3A3A3A | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D3F45
#1D3F45
oklch(34.5% 0.041 210.4)
- #4C312C
#4C312C
oklch(34.4% 0.041 30.9)
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 #1D3F45, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.023
- Midnight Green #073B4C ΔE 0.027
- Onyx #343A40 ΔE 0.031
- Charcoal #264653 ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.043
- Gunmetal #293241 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.044
- Dark Teal #014D4E ΔE 0.045
Use #1D3F45 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.