#1D458D
Closest named color: Cobalt (#1E488F). oklch(40.5% 0.128 261), rgb(29, 69, 141).
Aa
White text reads best on this color (9.17:1).
About this color
#1D458D is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.128 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.009 away. White text reads best on it, at 9.17:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.28:1 |
| White text | 9.17:1 |
Values
| HEX | #1D458D |
| RGB | rgb(29, 69, 141) |
| HSL | hsl(219, 66%, 33%) |
| OKLCH | oklch(40.5% 0.128 261) |
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 #1D458D | 9.17:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #1D458D | 2.28:1 | Fails | Lc 13.2 | Not readable |
| #1D458D text on white | 9.17:1 | AAA | Lc 90.7 | Preferred for body text |
| #1D458D text on black | 2.28:1 | Fails | Lc -11.6 | 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 800.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF5
oklch(88.5% 0.041 260.9)
-
Step 300
300
#A6C2F2
oklch(81% 0.075 261.1)
-
Step 400
400
#75A0EB
oklch(70.6% 0.12 261)
-
Step 500
500
#5287E5
oklch(63.2% 0.153 261)
-
Step 600
600
#366ED3
oklch(55.5% 0.167 261.1)
-
Step 700
700
#295CB7
oklch(49.2% 0.154 260.9)
-
Step 800
800 (this color)
#1D458D
oklch(40.5% 0.128 261)
-
Step 900
900
#214076
oklch(37.8% 0.1 260.7)
-
Step 950
950
#142645
oklch(27.1% 0.063 260.6)
#1D458D 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) | #194D90 | 0.022 |
| Deuteranopia (no green cones) | #00438C | 0.018 |
| Tritanopia (no blue cones) | #005662 | 0.099 |
| Achromatopsia (no color) | #484848 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D458D
#1D458D
oklch(40.5% 0.128 261)
- #604300
#604300
oklch(40.5% 0.084 80.6)
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 #1D458D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.009
- Twilight Blue #0A437A ΔE 0.036
- Light Navy #155084 ΔE 0.037
- Dusk Blue #26538D ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.050
- Blueberry #464196 ΔE 0.053
- Dark Slate Blue #483D8B ΔE 0.056
- Sapphire #2138AB ΔE 0.059
Use #1D458D 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.