#043983
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.135 259), rgb(4, 57, 131).
Aa
White text reads best on this color (10.94:1).
About this color
#043983 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.135 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.035 away. White text reads best on it, at 10.94:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.91:1 |
| White text | 10.94:1 |
Values
| HEX | #043983 |
| RGB | rgb(4, 57, 131) |
| HSL | hsl(215, 94%, 26%) |
| OKLCH | oklch(36.3% 0.135 259) |
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 #043983 | 10.94:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #043983 | 1.91:1 | Fails | Lc 9.3 | Not readable |
| #043983 text on white | 10.94:1 | AAA | Lc 94.6 | Preferred for body text |
| #043983 text on black | 1.91:1 | Fails | Lc -8.0 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFE
oklch(93.6% 0.029 257.8)
-
Step 200
200
#C3DBFF
oklch(88.5% 0.056 258.4)
-
Step 300
300
#9BC2FF
oklch(80.8% 0.097 259.2)
-
Step 400
400
#63A0FF
oklch(70.7% 0.154 259)
-
Step 500
500
#3384FF
oklch(63.1% 0.199 259)
-
Step 600
600
#006AEE
oklch(55.7% 0.215 258.9)
-
Step 700
700
#0058C9
oklch(49% 0.19 259)
-
Step 800
800
#0048A7
oklch(42.7% 0.165 259)
-
Step 900
900 (this color)
#043983
oklch(36.3% 0.135 259)
-
Step 950
950
#08244F
oklch(26.8% 0.086 259.1)
#043983 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) | #004286 | 0.025 |
| Deuteranopia (no green cones) | #003782 | 0.007 |
| Tritanopia (no blue cones) | #004C58 | 0.103 |
| Achromatopsia (no color) | #3C3C3C | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043983
#043983
oklch(36.3% 0.135 259)
- #533800
#533800
oklch(36.3% 0.075 78.5)
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 #043983, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.035
- Marine Blue #01386A ΔE 0.043
- Cobalt #1E488F ΔE 0.052
- Marine #042E60 ΔE 0.067
- Light Navy #155084 ΔE 0.069
- Sapphire #2138AB ΔE 0.070
- Royal #0C1793 ΔE 0.073
- Prussian Blue #1D3557 ΔE 0.076
Use #043983 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.